what fitting and where to get it?

Planning on buying a Huma external adjustable regulator so I can use (no brainer) tethering from a tank.

And here my confusion starts, I have 3 tanks 2 different standards:

- one Acecare 9Liter CE HPA with a Female to Din300 connector (we can see these at aliexpress the most),

- two SCBA 140cc with some CGA347 Male thread connection. And these two tanks I am tinkering to convert somehow to Din300 connector (as to use the Huma).

I may be wrong but really doesn't make sense to me replacing the entire valve which have some I don't know where to get 7/8-14 thread....I have not seen any of these @ ali.

But is there a possibility to find somewhere an adapter/fitting from CGA347 Male to DIN300 Female ????

If I can make it work all 3 to tether in simplest way that can save my YongHeng some lifetime

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