Try Rockville Mitsubishi , MD , and Korum Mitsubishi, Seatlle for discount OME pulleys , etc. I get the E- address mixed up so I give the buiness names to google.
Ive had really good luck with both these internet dealers.
All Mitsu rubber stuff is superior to any , esp. your main crank seal you'll want to replace at the same time.

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.