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To start with, air was standard in 82 Corvettes, so there's probably not much of a market for it.
They don't make a system for any 77-82 Corvettes, again probably because there's not much demand for it. Air was standard on 80-82's and the large majority of 77-79's came with it too. The 77-82 Corvettes used the R-4 compressor, which is basically the same compressor that's used today.
From my experience, the factory air in an 82 works very well. The R-4 compressor is very efficient, and I'm not sure a Vintage Air system would be a performance upgrade, over the stock unit.