Are you looking to build your own following the guidelines of this thread or are you looking to buy a ready made one? If the former, I have a spare BNIB Airgas Y12-215D580 that's ready to be DIY'd along with some extra Swagelok fittings that I'm not using.
http://www.airgas.com/p/Y12215D580-AG
If the latter, shoot Alanle a PM. He'll be happy to build you a custom killer rig.