Where Can I Get A Jigsaw Puzzle Shaped Photo Frame?
Or you can glue old puzzle pieces that you have spray painted onto an old frame.
This was some auctions for puzzle piece frames on ebay...
Jigsaw Puzzle Discussions
Filed under Jigsaw Puzzles for Sale by on Sep 23rd, 2009. 
Comments on Where Can I Get A Jigsaw Puzzle Shaped Photo Frame?
You can get a frame made to fit any size you want but getting one that’s like a jig saw puzzle piece is unlikely. However, there are some on ebay they look crap but maybe what you want