Bringing this back from the dead! I went with a direct replacement of the old tank to keep my 52 gallon capacity and keep the existing electronics.
My 20 year old steel tank finally sprung a leak... had a local welder fabricate the exact same tank out of aluminum.
Transfer Flow in Chico, CA. were not helpful at all in the process of looking for replacement parts. The old threads mention a very helpful person, Brad. The new guy told me "it would be really expensive man" in a surfer/stoner vibe. He then said that the fuel sender info would be "in the archives" and he would look it up... But I never heard from him.
So, I used the old sending unit, with it's unique OHM rating. Cleaned it up, used a Buna-N gasket on the tank, bought new fuel fittings, and it works fine.
The external solenoid transfer pump was reusable as well, but i did find a replacement for those looking. I'm sure TF would charge more than $40!!
Part # 070FU32274.
Hopefully this helps someone on an aging TF system!!