I've got a large cover-up on my upper-arm that was put together using pieces of three different flash pieces. Worked out well. CTC has always had a huge amount of flash, first on the wall, then on flip-panels, and it ranges from old, old familiar pieces, through the decades. You can really trace the history of tattoing, say from the forties through today. There is old traditional designs gotten from tattooers long ago and far away, to iconic sixties and seventies flash, to modern stuff. If you are in a decent shop, you should be able to find something, or pieces of something, that can be made into whatever it is you are looking for.