Male DIN Valve for Dolphin Question

[Zugzug]

I have a Drager Dolphin Unit which I would like to get a larger tank for. The Dolphin Regulator has a DIN type valve which is the reversed of the normal DIN configuration. F instead of male.

Getting a tank isn't a problem, finding a Male DIN valve for the tank is. Anyone know who/where I can find such an item? I know someone makes them, just don't know who.

Thanks