Just had my red 89 trans am painted. I've been looking for the six pieces of molding. There is a company called Spoiler and Wing King. I just emailed them asking if the molding they advertise is six pieces or just two pieces that are only for the door. The colors they show don't match the Bright Red but I can have the body shop paint. I'll repost when I get a reply from them on my question.

 

I've installed a few sets of aftermarket ones, but off the top of my head, I can't remember if I got them from Classicindustries.com or hawksmotorsports.com

One of those companies has what you're looking for. They are the 6 piece sets and they look exactly like OEM