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I have one that I saved from a recent non-AC to AC conversion. The images above show the harness used in a 1986 application. Not sure if it is the same part that was used in a 1988. Very little out there as far as part numbers & availability (like nothing - I couldn't even find one image).
If it is the correct part - just let me know and it's yours. Sorry but, the control head is not included. That part is spoken for and is down in PA awaiting pickup.
In a few minutes, I am headed over to the storage units (all my auto parts have been banished from the house). I will see if I can find it. If I do, I'll bring it back and get some better images of the harness connectors.