If it's not available retail, I'd get it from a dealership. Or maybe mail order. Especially for an air filter that is not changed often. I do it for my oil filters too, but I buy a few at a time.
I have seen AC oil filters at quite a few places, Pep Boys, Murrays and AutoZone to name a few. The air filters seem to be less available. I know Murray's used to have a good selection.
[ September 05, 2003, 02:17 PM: Message edited by: Jason Troxell ]