NOS qaurters are insanely expensive for a non number matching car. Save those for Z/28's and bigblock SS cars.
The repop qaurters are very good for these cars and fit great. They are actually the best repop metal piece available for the second gen.
The repops are a few hundred each, NOS are 1400 or more if undamaged and really don't fit any better.
1973 Camaro - Fast burn 385, baer, hotchkis, hydraboost, 700r4, vintage wheelworks v-45s, finished 2007
1972 Camaro - Project Fool's Gold - LD 3-link, DSE sub-frame, LS2 stroked to 402, TKO 600, In progress