Hop Up Gears

[Jbone 11 11]

Wondering if there is such a thing as 'metal' cogs or gears for Hop ups. Not sure quite what happened, but my main (blue) plastic cog on my hop up looks as though its taken a round, and thus is super loose. Also, from various barrel (inner) changes/swaps, and lack of experience taking the hop up apart, the plastic bits are not fairing too well.

I've always thought the plastic bits were chinsy, and would like to swap them out for metal ones if possible.

[Darklen]

I've been looking for various meathods of improving these as well, but other than the standard plastic gears, I've found nothing. I'm sure you could get a machinist to fabricate some up, but no doubt there would be a significant cost to it.