Layson's is hit or miss, and if you do go through them, deal directly with Rick. I've got emblems from them that were good, but I got tail light housings and lenses for my Barracuda, and the housings did not fit. They tried to say it was my cars body, but I had 3 sets of originals that all fit perfectly. The lenses were not the right color red either. The originals are a dark red, and their repops are lighter. I was going to get the rear window trim from them until the tail light issue.
A lot of mechanical parts can still be found at parts stores, and you can still get new windshields. Any other glass, you'll have to find used. I think Legendary has interior stuff.