Acrylics mounted on metal panels?

[Mark Anthony]

I've had a customer ask if i can supply a set of small acrylic panels, that are mounted on a larger coloured metal panel, but the photo's just slide in and out of the acrylics so they can be swapped and changed randomly.

Does anywhere know where i can get these from, they're similar to loxleys multi acrylic products, but need the metal back panel and be interchangeable.