I've used a few sets of the Palco convertible rear panels. Didn't have a choice.
We had Y-1 cover some panels years ago and though they looked good We just were not that impressed.
I have also used several of the Metro front panels and a few rears. Mostly Cuda and a couple Challengers. Though much better than any other repros they still don't fit quite as nice as originals. Still tight on the front nose and all the Cuda ones I've had to space the door handle out so it doesn't rub and hang up on the panel.
Here are some pics of the Palco rears and Metro fronts. Of course the Palcos need to be painted the correct white.