Go with Bill Edwards!
Email him at beewagon69@yahoo.com or check-out his site at http://allmoparseatbelts.com/

If you email him he'll usually respond right away. He's a really good guy to deal with and his prices are more than fair.
He may also have other items you need.
I called for seat belts and ended up buying the belts, an upper and lower dash pad, and glove box door. All items were VERY reasonably priced.