its in one of the threads in the Mitsu FAQs section...
1101A022
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I got mine from Korum Mitsu,,,link in FAQ section,,,for like $5.00. Dodge dealers wants around $20.
You might want to get the Bellvue vwasher with it. Part number is in here somewhere, also.

dave h.
'89 Raider V6 5spd;Aisin Hubs;; Gen2 LS: frt. brakes, rear coils;U.C.arms;R.trailing arms;idler arm; rear LSD axle w.disc brakes ;2 battery system for Dog's fan; relocated ECU; custom bumpers;J.Baker receiver;Conferr roofrack; t-bar crank.