CO2 power

Please, can anyone help/provide information?
I've been bequeathed 3 Gasparin CO2 motors along with an early K&P charging adaptor and a green Sodastream Cylinder.
The cylinder's empty and is now an obsolete item.
The new cylinders have a different thread. The old one's 1/2" BSP and the new one is 6tpi Acme "square".
I need an adaptor that's a 1/2" BSP male one end and the 6tpi Acme female the other end if I'm to enjoy my inheritance using the new Sodastream cylinders.
Derek Knight emailed that he's too busy to spend time on such a project.

All help appreciated, Deezil.

Deezil
It appears such an adapter does exist .

Soda Stream female Tr21-4 to Male Paintball G1/2-14 (0.825" - 14) which is 1/2" BSP but I have no idea if the Soda Stream thread is 6tpi Acme "Square" but all Soda Stream adapters use it.
A bit expensive to "try and see".
The most common Soda Stream adapter has a 21.8 -14 male thread, thus just under 1/2 BSP, that is used in home brewing.
Sorry I can't be more positive.

 

Thank you for your thoughts. I'd never have thought of the paintball aspect of it. I'll have a look around and find a supplier. 

Regards, Deezil.