Yard below is one of the best resources I know of - a lot of old "classics" of all types. Last time I was there, no 1st Gen Camaros, howerver, a lot of GM products with similar or same general parts, fasteners, etc.
They are located in southern California, on US Hwy 395 just north or Inyokem, CA and the junction of CA State Hwy 14 and US Hwy 395. Might try givng them a call. Check out their website - lots of pictures of old rides sitting there in the low humidity of the desert.
Pearsonville Auto Wrecking
236 Pearson Rd.
Pearsonville, California 93527
Phone Number: (760)377-4585