There are a few yards in Morrisville (just over the Rt 1 bridge), but I haven't ever seen an LT1 F-body in either of them. Mostly 3rd gens with the occasional 4th gen v6.
Talk to the guys at Contemporary Corvette in Bristol - they have a large salvage yard that is full of corvettes, 4th gen F-bodies, and a few other performance cars, and their prices are usually fair.
http://www.contemporarycorvette.com/
- Justin