Ouch! Guess you learned a lesson the hard way..not trying to sound like a know it all, but one rule I keep is never to touch the AFM short of disconnecting the wiring harness if needed. You might look on EBAY or call a parts yard if you end up replacing it. Last I checked the dealerships wanted like an arm and a leg and your first born for an AFM.
Heres what I found on Partsvoice.com which lists dealership inventories etc.
1989 Toyota 4Runner V6 22250-65010 $567.45
Hope you can fix yours.
~Darin

88' 4x4 *22R-EB Gen II*
87' $Runner *22R-EB Gen I*
85' Sillyca 22R-Esq

"I LIVE IN MY OWN WORLD...THEY KNOW ME WELL THERE"