So I looked it up cause I needed to waste some time waiting for paint to dry. I found this partshotline page it has one 1`992 and a couple 94 and 91 gas tanks. the 92 is in Grover NC L & L Auto Sales & Parts
855-890-9506 Ext 296319 Stock # J644 $50 from a 2.4l 105"WB 4x2 Don't know if that will work on a 4x4

https://www.partshotlines.com/parts/mitsubishi/pickup/fuel-tank.html

http://www.usedpartx.com/usedparts-s...309e&seq_num=6

This site says it has the 105 and 116 WB 4x4 tank