Ron, Have you tried Rock Auto? I've bought several replacement parts for my '88 through them. Here's the catalog link. I don' have the AC part number - sorry. Had an '85 many years ago, but it's long since gone and I can't remember many part numbers for it.
Here's a thought - those guages are interchangeable throughout all years - they don't all look exactly the same, but functionally, they are all the same spec. If you can pick up a used cluster cheap on ebay, and really get serious with the seller to guarantee that those two guages work.... well, I've done it. I have to admit one of my cars has yellow needles and orange needles, but everything works.
Posts: 265 From: Rochester Hills, MI US Registered: Feb 2005