Interchange bottle regulator help

So I got a free HK army paint ball tank. I know it not ideal for pcps. But my gun only fills to 200bar and the bottle only fills to 3000psi, so the bottle is like 100psi higher. But I digress..my question is will I be able to But a pcp gun regulator/ full station on this bottle? And any ideas on a cheap one? I'm somewhat new to pcp air guns.but I did buy an shoe box compressor last week..so is I can get at least one gun fill out of the bottle I'll be happy. And my rifle I'll be using the bottle of if a hatsan flash. 22..thanks for any feedback or suggestions