Fuel tank replacement

[Moredstripe]

Would appreciate any advice or comments about replacing a fuel tank. I have a 1987 23' Walk Around that started leaking gas the other day. The info on tank says it was built by Florida Marine Tanks, Inc., in Hialeah, Fl., with a capacity of 112 gallons.
I took part of the deck off today and it seems to be a job too big for me. I believe I've found someone to do the work but finding a tanks seems to be the next problem.
Would any one know if the Florida Marine Tank company is still in business and still fabricating for SeaCrafts?, if not, any suggestions where to get a replacement?

Thanks