I had Moyer Fuel Tank Renu at
www.gas-tank.comLooks like its a franchised business with dealers around the country.
http://www.gastankrenu.com/loc-dealer.htmI did it on a 56 Dodge. There is simply nothing new available and nothing that I could make work in the stock location.
You did not say what kind of car, my advice is search for a reproduction for your application It will be less expensive.
Quanta seems to have the largest selection.
http://www.gastanks.com/ If you do have it done Moyers does a great job, and I expect this will last FOREVER.
Scott