Man, sometimes I think you're working on MY car. I just bought a standard tail panel on ebay for 9.99 plus shipping just to get the reflectors. The actual tail panel was damaged on the left. The way I got the reflectors off was by dripping "GooGone" into the edges from the back side. If you wait long enough (this takes patience) they will literally fall off. I didn't wait.... so when I took them off, tiny pieces were still stuck to the panel and they broke off. Luckily, I was able to save all the tiny pieces and I superglued them back on then polished the lenses. Didn't come out too bad but certainly not perfect. For me, imperfect reflectors were better than no reflectors at all
I'm actually trying to figure out how to get them back on. The reflective foil and no where to glue to has me puzzled.