You might give the dealer a call, but the sleeves are glued in to the oem bushings, and the washers are held on by flared ends on the sleeves. Chances are the oem replacements are the same, and is why they cost around $50 each. It is a bit of a PITA breaking the bushings down, but not impossible.

If you have to have the truck done over the weekend, you might grab a set of used A-arms from a wrecking yard, or someone off of craigslist. You might give Davez Off-road a call, they may some laying around, and they are just outside Placerville.

More than tread lightly. Leave it like you were never there, nor anyone else.
'90 X-cab 4.88's 33 BFG AT's, rr ARB, Headers, Ignition upgrade, cold air induction.
'91 X-cab 5.29's 315's BFG MT's, rr ARB, custom bumper and flatbed