What sites and forums have you searched? I just looked through f*book marketplace and found several....
one on Cape Cod - W. Yarmouth
one in Rhode Island
a few in CT
further out of those 6 states, but same travel time to points in Maine...
One in eastern NY state
a few in NJ; one listing in Newton, NJ - guy has 3 factory GM hoods lined up as new.
one in MD
and you can also buy the re-pop from Goodmark.