On Thursday it was announced that Mr Derry and Mr Hymas had come close to securing a deal to buy Mansfield Town Football Club from controversial owner Keith Haslam for the second time in two weeks.
But once again the other half of their £500,000 buyout pulled out at the last minute as the takeover was due be signed.
Now the duo have gone public and urged other businessmen to back their bid, now that Mr Haslam has finally agreed a deal to sell the club.
They need another £250,000 to complete the takeover. The £500,000 the consortium puts in would be working capital, with the new owners paying just £1 for the club - the amount Mr Haslam paid 15 years ago - and renting the ground, with an option to buy.
Mr Hymas (45), a lifelong Stags fan, told Chad: "We can't do this on our own. We need serious people to come forward now and make this deal happen.
- Takeover statement in full from Derry and Booth
"They need to be prepared to put in say £50,000-£100,000 now . . . and and if things go right, the fans and the sponsors etc come back as they have promised, then that should be enough to make this club viable and turn it around.
"People say that they want Keith Haslam to go. Well now is the chance and the time for action, a deal has been agreed and we just don't want this takeover plan to die a death.
"We would have a zero balance on day one, but have no debt. That is why we need this £500,000 to work with - you can't go in with less than that because of the cash flow.
- Listen to the Chad panel talk about the dramatic developments on the latest edition of Stags Talk. Click here for our audio show
"There must be local business people out there like me who have the money to put in. A takeover now would be a massive uplift for the club and the fans and give us a better chance of staying in the League.
"If we don't act now this club will go into oblivion."
Mr Hymas added that he and Mr Derry were prepared, if necessary, to stand aside and just be directors on a board, allowing others to be the figureheads and run the club.
"We don't want control, we are not control freaks. We just can't do it alone. We are not Roman Abramovich. Unless you have money like him, it is impossible to do a takeover and a run a club on your own."
Mr Hymas runs Mansfield-based Hymas Homes - whose developments have all been in the Mansfield district - after leaving Brunts School in the town and working at Mansfield Colliery for over 13 years.
A loyal fan, he was brought up on Stella Street in the town, 'from where you can see Field Mill', has been married for 25 years and has two daughters and granddaughter.
He added: "I went to my first game when I was five, my dad was a season ticket holder, everyone I know is a Stags fan . . . it is just in my blood.
"There must be people like me out there who have a bit of money to put in, almost like as a hobby, because they want their local club to survive and move forward. This is not a whip-round, we need a few 'serious' backers, people with some money to spare.
"We are not coming in to the club to make money and sell it, we want this to be a good future for Mansfield Town."
Ironically it was a public appeal by Mr Derry last summer, when he first announced his interest in launching a Stags takeover, that brought Mr Hymas to the chairman.
- Stags takeover news centre
Mr Hymas was part of the Derry consortium which first had a bid accepted and then finally rejected last autumn. Other members of that group declined to pursue their interest, but Mr Derry and Mr Hymas remained convinced they could do a deal.
Over Christmas they teamed up with an Australian group headed by Steve Dolheguy and thought a takeover would be concluded on 29th February when they agreed a deal with Mr Haslam.
But one of The Australian's backers withdrew at the last minute two weeks ago - leading to the first failed takeover on the agreed deal on 29th February.
Then on Thursday morning a new member of the Derry consortium pulled out when a deal seemed likely to be signed, prompting this fresh appeal.
Mr Hymas added: "We have been working on this for months. We have spent a lot of money on lawyers. James has put in an amazing amount of time into this. He does not draw a salary from the club, but has put in a lot of work that people don't appreciate."
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