anything that has a 1" id (as the female stab has a 1" od). I've had luck with kapp craddles for AA raptors and some centerflag adjustable tank regs (bacci has a lot of these for cheap and they work really well, they're very adjust as to position of the tank/reg (i.e. right or left side) and come in a short and longer version depending on how much of a drop you want). but like I said, anything with a 1" id and set screw to keep it in place.
you might have to fiddle with its position to get the output fitting/hose and/or gauge to fit, but I've never had a problem with that