email me at andrewseltzman@gmail.com
Other items listed on ebay:
https://www.ebay.com/usr/rtftechnologies
A Piezo valve and PID controller to stabilize fusor pressure when connected to an MKS901p analog output [SOLD]
This takes a 0-5V input from the 901P and stabilizes fusor pressure. Description here:
viewtopic.php?p=69890#p69890
2x 1sccm mass flow controllers. Untested, $150+shipping each