It's a Mitsubishi part. I found one at a dealer a few years ago but I didn't buy it. Instead I found snap rings with the same thickness and then grinded off the little loops where snapring pliars would go. It seems to be the same snap ring on the inner and outter ends so you can size it by just taking the one off the outter end behind the hub cover. I haven't noticed any problems with that solution.

87 Dodge Raider 5sp 2.6l no jet valves, Tuffpan
OME Dakar leaf springs + T-bar crank + 2" body lift (4" lift).
5500lb winch, Starion alternator, grp31 marine bat'
OBA (stock AC compressor)
33x12.5x15 Baja Claws or Wintermark extra load 235/75/15 M/S