pneumatics help

May 2008
I'm constructing a 2D nozzle for fluid testing. I have made my nozzle X5 larger and taken a 1/8" slice. Now I'm having trouble designing the 2d nozzle so that the exiting air will have a velocity of 3ft/s. I must maintain an Re number of 1000 as well. My problem lies in that fact that. I can only buy pressure regulators. So what pressure must I use to achieve a exit velocity of 3ft/s
A=.000128 ft^2 (rather small)

Please help!