Any idea of where to get exterior side black trim for a 1992 GS coupe?

I need the left rear quarter panel trim piece. Somebody backed into it and never left any information. The panel is caved in and the trim piece is broken in half. I bought the car new in May 1992 and am the original owner. Also have an 01 Park Avenue that I bought new in Feb 01 (now has 65,000 miles on it). Both have been garaged kept since new. Hate to see them banged up. Any help would be appreciated.

You can try to search E-Bay, although I am not sure how well installing old trim would go, never tried to do so.

Another place I like to look is I want new parts, and do not mind spending a little extra for them is here.

MOLDINGS/BODY-BELOW BELT. Fits: 1992 Buick Regal GRAN SPORT 2 DR | Nalley Buick GMC Brunswick

Thanks for the info. Tried them after receiving your response. They don'e carry any trim parts for the GS. Thanks again.

Ahh, sorry they don't have any of the GS Trim, it was worth a shot, if I can find the trim somewhere else I'll post a link to it.