I've had crappy luck finding Transformers -- just FAB Skids and SWTF Obi Wan.
But I did find these:
The pictures don't do the amount of glitter in the puzzles justice. It makes them both shiny and delightfully cheesy. Best of all, since they predate the prequels, I didn't have to face the dilemma of (not) purchasing them.
Bought the frames separately, after putting together the first puzzle and seeing it was intact.