Seriously Mind Fucked

Alright, so I bought a 97 xj about 8 months ago, and finally have started to work on it. The PO said the gas tank needed replaced, but they also poured a whole bottle of stop leak into the radiator, so who knows if it's true.

Anyway, I cannot, for the life of me, find a replacement tank for the Jeep. Am I missing something? The only tanks I can find fit all the way up to a 96. Someone please point out my stupidity if their is any. Thanks everyone!