I think that late model resto has new ones.
For a quick fix, I just opened up the housing that holds the retractor and wound the metal band inside it tighter. I think that the reason it quit working is because the metalband that is wound inside it came unwound. The factory just bends up a small tab at the end of it. The problem is that either this tab bends back almost straight, or the plastic that holds the tab breaks. If the plastic is broken then you need a new retractor. Mine was fine so I just slid the end of the band out of the housing and bent it back, then I took a butane torch to it (I figured this might harden the metal so it wouldn't bend out of shape again).
DON'T REMOVE THE WHOLE BAND, THIS WILL BE A PITA TO GET BACK IN!! If it unwinds then just wind it up again, just not too tight as it will bind up, and too loose will not work either.
I hope this helps. If you have questions, just PM me. Later.
Mo' Town
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GAU89LXStang
I got this out of one of the similar threads at the bottom of the page. That is his user name at the bottom if you want to shoot this person a PM.