Sources of replacement seatbelts
 

My early GMT400 (1989) driver's side seatbelt refuses to retract properly. I've taken it apart before and got it partially working, but now it's time for a replacement. I believe that they are the same from 1988 through 1990. Correct me if I'm wrong, please.

Has anyone found a source for a bolt-in replacement for these belts? Mine is a standard cab, medium gray (colour 82). Used original-style passenger-side belts pop up on eBay from time to time, but driver's side never seem to...I guess because they get all the wear. ;)

There are a few manufacturers selling nw replacements, but I haven't found a set that's close enough to original-style.

Ideas? Thanks.