Have you checked you local salvage yard (junk yards) There is bound to be one around there somewere in a wrecked truck. I think maybe they are the same as a later model 4X4 S10 with the 5-speed, a junk yard can tell you the crossreference data if they dont have one.
Have you check the price of a new one from a chevy dealer, it probably high, but you wouldnt want to give $100 for a used one if a new one only cost $125. Just a thought, I have no clue what the price is. I just like to know the price of a new one before I buy used.