VIP compressors are a very rare beast. Only end user I know outside of the US is Petrovietnam (Vung Tau),pumping natural gas, mol 21.2.
These machines are 4 cylinder, single stage. 900 rpm.
Inlet 675 psia @ 77 F
Delivery 1643 psia @ 190 F
The inboard and out board heads act as inlet valves...
Compressor Sales and Service (CSS) is a company in Thailand that can manufacture to specification. Although the company is situated in Thailand, it is operated by German engineers. Low cost due to low overheads and efficent German engineering.
Contact.
www.compressor-service.net.