Forums at Splitcoaststampers
I found it by doing a search for "acrylic+frames".
Don't know how to search?
If you have questions on a specific subject go to forums and then search. Type in a few keywords (in this case acrylic+frame* ) and click "search all terms"
It will bring up a lot of good threads for you to search. Sometimes you have to play with the wording until you find the right one to answer your question.
Whenever you have a question it is a good idea to do your own search first-chances are the answer is waiting for you already.