I may be interested in one, but depending on quality and accuracy.
First, the cap shouldn't have a strap and a hole in the back to adjust size. It was one-size on the movie cap.
Second, the colours should be shiny and fast-changing.
Official lenticular caps from Diamond Select has vivid and shiny colours, very accurate, but the strap on the back ruins the replica.
Miraj caps had no strap, so they were ok, but the colours were much more dark and not so shiny as they should be.
Hoping you're hitting the key on this replica :-D