Re: Cal 31
I think you need to google custom boat water tank. I found several companies offering to design and build custom tanks. There is no mold required - they just "weld" together sections of plastic to create the tank. I paid only a couple of hundred to get replace the (leaking) stainless diesel tank with a custom aluminum tank and I can't believe plastic would cost more. I haven't looked at mine yet but would wonder that the biggest job would just be removing the old one and slipping in the new one. Don't overlook the opportunity to replace your hose while you are at it.