I just started looking around panel mount quick disconnects, and I found these couplers from Colder Products:
http://quickcouplings.net/osc/produc...f4626a1dcf64ac
http://quickcouplings.net/osc/produc...f4626a1dcf64ac
I like these because they are valved on both halves, so fluids will not drip from the cooler end or from the torch. Pretty easy to color code with some shrink tube, or you can just reverse the fittings ... They have panel mount options for both halves of the connection. They also have options for NPT, compression and PTFE in addition to barbed. I'm thinking about mounting these on my welding cart as a remote connection back to the cooler inside.
Cheers
Mike