Welcome to the forum.
I'd offer two suggestions. First -- if your tank is like my '65 Caravel
was, plan on dumping it.
I made one out of fiberglass, documented here
. It's certainly more work than a new one, but the cost isn't bad. Consider the wood as sacrificial and think of the several layers of fiberglass as the tank.
Another option is to draw up your tank from the old one and order a new one like Tim Shepard did in his blog on the VAP. See his blog post here
You do know about the VAP
, don't you?
Good luck with her.