[squirrelproductions]

Originally Posted by BiscuitSlayer

Aquabotanic still sells it and it is a regulator for a paintball rig:

http://www.aquabotanicstore.com/CO2_...or_p/10174.htm

I have been considering this one for a nano setup, but I wanted to see about trying to rig it with a solenoid and decent needle valve.

Here are some "not so glowing" reviews of the valve (not really a regulator) which BiscuitSlayer linked; look in the later posts for issues/resolutions people had with the valve.