Bobthewelder Ballina Australia has a great selection of TIG Torch Adaptors, Dinse cable connectors, Dinse TIG torch adaptors, TIG cable conversion adaptors, we will have a torch adaptor that will suit your needs.

10-25 x 5/8" 18UNF Female TIG Torch Adaptor.
10-25 Male Dinse
9.0 mm Dia pin.
5/8" 18UNF Female thread connects to Torch.
1.8 Metre gas hose 5/8" 18 UNF-Male thread
See Images with Verniers compare measurements.