I don't have part numbers for individual wiring harnesses, and the dealer will have to order them. The harness should run from the sensors, through the firewall near the passengers strut tower, and to the PCM. The harness probably is shared by other sensors/controls. The problem is that there may not be a connection point at the firewall.....it may go straight through. You're going to have to trace it.
I'd suggest a wrecker for the harness, this can give you the experience. Pull the replacement first. Then do yours. Stick with a 92 or 93 to be safe, and anything from SE to SSEi should be fine.