Hello, I've recently started building my first ever robot,

so far ive made the chassis from aluminium, used 18v drill motors and gear box, ran from 12v batteries, my ESC at sorted, and receiver, and that's all working better than I had thought, being my first build!

im going to have a pneumatic flipper, the tank I've got is a 0.8 litre Zen paint balling tank, I've got a gauge and regulator, the only thing I'm struggling with is finding a filling to take it from the one it is, which I assume is the standard paintball tank, to a normal size thread, I've had a search through the posts on here, and a Google, but I'm struggling to find a fitting that isn't from China.

if getting the right fitting has a built in gauge and regulator, if be more than happy to replace the ones I've got!

Thank you!