Yep, they do, but much harder to find. There are some for theatrical, and event use. I had to get one a while back. (Cant remember where... A company in Vegas? They made a nice one.) Otherwise, you could make your own..... (Depending on what the final use is - your own, or for sale, if for sale you might want to shift the liability.)

Take a look at what is out there though.... I can see a few things that could be done better than this....
[Linked Image from unionconnector.com]

[This message has been edited by e57 (edited 09-04-2006).]

Mark Heller
"Well - I oughta....." -Jackie Gleason