I built my own out of a refrigerator compressor, a schedule 80 PVC chamber. The parts were picked up from an old surplus shop in San Jose, Ca. (Including the adjustable vacuum switch and solenoid/check valve)

I did purchase a few parts from ASC in San Leandro, CA. (Tube/sleeve bag material, peel ply, hose, hose/bag fitting, bag sealing clips, and vaccum gague.) They are a top notch shop in my book. Professional and quick. Prices seemed pretty reasonable. I wouldn' t hesitate to deal with them again.

I will post a few pictures of my system later tonight when I get home.

It took me less than a day to assemble the entire system.

Everything combined was under $120.00.

Ted