Best fuel tank for these trucks

[tracterman2]

who makes the best fuel tank replacement for these trucks?? I'm going back original...so I'm looking for the tank behind the seat. I have seen the LMC and Jim Carter...I was wondering if anyone else knows of any others that are different qualities or prices...or maybe even different materials...all opinions welcome....I do want to keep the tank behind the seat though...just for originality. I have heard of a few on here that actually build tanks...are any of these for behind the seats?? I know most things built by people that are not "factory" built are higher quality items, mainly because their names are tagged to them. Thanks again for the help.