The swap meets will probably have to wait till we get through spring up in your area. As far as NPD they are one of my favorite suppliers, Virginia is good as well, purchased my weatherstriping from them and at a good price.
Used part vendors like Classic in Oklahoma have alot of parts but like David said kind of pricey. Perogie is very similar (
www.perogie.com) but at least they are in New Jersey. Try this website as well
www.69mustang.com
Don't forget about ebay they can be very helpful, I have purchased many parts that I had a hard time finding any other way.