There are a couple of places online where you can place a request for a part to a network of junkyards across the country. I've never used it for my Pacer (ebay has had all the parts I've ever needed for junkyard pulls), but the PO of my car did use Parts Hotline to get a Pacer gas tank. I think it was $50, less shipping.
http://baltimore.craigslist.org/pts/4388713026.html
This guy had corvair parts- including a 67 for parts. Good luck.