Does anyone know where I can get one of these? I've photoshopped this but I'm sure they must exist

Hmmm, that's a strange configuration, but quite a few of the cheap LED lights have something similar, I'm sure you can find something on ebay - if nothing else you should be able to find components that you could merge together one way or another.

Peter, is this it?

If so, tell 'em DV Info Net sent ya!

Found at D-Flashner | Cam Caddie Professional (http://www.camcaddie.com/pro/d-flashner.php) for $25 USD.

Nice one Chris - looks like exactly what I'm after :)

Not sure why you'd want to but buy two of these and screw them together.

http://www.amazon.com/Tripod-Mount-Hot-Shoe-Adapter/dp/B00CXN1IZS