Andrews Communications is selling these.
http://www.andrewscom.com.au/site-section-10.htm
I fully intend to buy one when I have enough money saved. That said, I'm a bit concerned over how much weight the focuser can hold, and where is the 2nd thumbscrew for tensioning? My GSO focuser for my refractor has the two thumbscrews in a row. I really hope the newt version has it on the opposite side to the locking screw.
Cheers,
Cam