You should really become a premium member on this message board and post a "WTB" want to buy in the parts section...
I got mine from ChevyManBill on instagram, but bought them from his ebay store
https://www.ebay.com/sch/vintagechev...m=154810731736
I don't see any currently listed. You can call him or message him. I think he's on this message board also...