The rear valance was in terrible condition when I got it. Bondo was slathered all over, and metal plates with rivets were being used to try to hold the left side together as it seems it was crumpled sometime before I got it. I ended up drilling out the rivets and removing most of the bondo carefully with a razor blade and a heatgun. I've been plastic welding/filling the holes and cracks to get the valance into a much better looking shape.
I sanded a strip down the corner I was repairing with 320 grit, which revealed that it had been sprayed over with black at some point and the original paint was this blue metallic
I realized this blue metallic paint looked awfully familiar to the car in the Zenders catalog that was used to advertise this valance and started to look a little closer. In the original photo the left exhaust tip looks to sit very high to the valance almost touching it, whereas the right side is drooping a good bit. On the valance I have, there's a witness mark in the plastic caused by what one could only assume was an exhaust tip. I sanded down that same area of the indent to see if the blue paint was there too and it was! On the right side of the valance there's no witness mark from an exhaust tip which matches up with the drooping right side in the catalog photo.
Let me know what you guys think, could this possibly be the same exact valance? I'm still a bit skeptical, but a big factor leading me to a yes is the fact that these specific rear valances seem pretty hard to find an original made by Zenders and not just the remolds people have been making.