M38A1 gas tank vs CJ5 gas tank

[maple_leaf_eh]

I have two M38A1 gas tanks. One is fibreglass glued into the vehicle. The other is loose, has been coated and repainted on the exterior, but has surface atmospheric rust on the interior. I was quoted more than a few hundreds of dollars to strip, sandblast and coat it back to serviceable. I have seen replacement M38A1 tanks for a few less hundred dollars. I also see civilian CJ5 tanks for half that price.

My dilemma is this - is there a one-for-one CJ5 gas tank equivalent to the M38A1? Or, should I take the hit and buy a drop in replacement?