Clarks's Corvair Parts is the biggest. They make all of the reproduction interior, etc. They also purchased dad's old hi-performance business in 1991 called OTTO Parts and still continue with that. They have most everything including some NOS. They are in your end of the country up in Mass.
They are
www.corvair.com
There is also Corvair Underground owned by Lon Wall. Lon is also a great guy. His inventory is not quite as large as Clark's, but often slightly cheaper. He is in the process of retiring ad getting inventory down. Lon is in Oregon.
www.corvairunderground.com
For used rust free sheet metal and used parts as well as some repro you could call Jeff @. He is outside of LA.
www.californiacorvairs.com
One more good guy is Rafee in OK. He inventories most of your day to day items;plugs, carb kits, plug wires, etc. and has great prices.
www.rafeecorvair.com
If you are looking for something strange and unusual, let me know. I may have it. I do have a good size NOS horde. Mostly trim performance items.