Air Brackets for Sniper2

I picked up what I believe to be a 92 (based on the serial#) Sniper 2. She comes with one of those wrap around stocks with the C02 brackets attached at the bottom of the stock (see pic). THe brackets are made for a 9oz C02 tank, basically too small for any tank I carry.

Any suggestions on what I can use to make a bracket for a 16 or 20oz tank? The existing brackets are non-adjustable. They have a set screw underneath that can be tightened to hold the tank in place. Ideally something adjustable is preferred.

Thanks!

I might can make a larger version of what's in the picture, if you still need it. I'd need to make a sketch and then send it to you for your approval & to fill in some dimensions.

If you are interested, start by telling me the bottle diameter you want to hold.

thx. I'm actually good on this. I have a 22ci HPA tank that fits the stock brackets just fine. Much appreciate your response.