As I understand the safety rules I need to fit a 1000 psi release valve between my gas reservoir and regulator. I have the release valve, but no way to attach it at the moment. Can anyone make or supply a pipe to connect everything together?

The regulator has a 1/4 BSPP thread, the reservoir is a 2kg fire extinguisher bought from Technobots - I hope these have a standard thread. The regulator connector mates with the extinguisher thread at the moment.