Co2 Nuts

So Dystopias Co2 - 1/4" BSP attachment sheared off at Manchester and hence i now need a replacement.

Until now ive been using a bodge, buying paintball refilling rigs then nicking the attachment off that - however thats £25 a time, and the attachments tend to be brass which combined with the last one being rather long is probably why it broke.

Was wondering if anyone has a good supplier of nuts, if not ive been told the best way to get them is to machine them yourself.

Thus if i cant find a decent way of obtaining the nuts, would anyone be willing to do a run of about 10 nuts for me? (i know alot of other people have similar problems obtaining the nuts, hence its probably best to buy a bulk).

2 Sources for me.

Co2 supplier has brass nuts. £9 each.

Old fire extinguishers. Can be free. Most of the time steel and smaller size