I need a pair of these. Someone had some recently. If there are any washers or anything that could go with them that would be even better. Shipping to GA 30101
Original ones in nice shape are hard to come by at times. If your goal is not 100% originality, I can suggest an alternative.
You can find on Ebay or AliExpress wing nut screws that are plated so they won't rust. They can be found in 1/4-20 pitch which is commonly used. I just went to the hardware store and bought 1/4-20 speed clips for the bracket side of the vent. For the body side, I had already purchased a Harbor Freight riv-nut tool and put them in the body side. Works and looks better than the originals and really inexpensive!
Not both sides had the wing type if i recall - I have a set but not in the most beautiful condition perhaps I can clean them up and see soon as I have time this week I ll get in my supply bucket and find them --