Co2 paintball tanks hold 1500 psi.
the "nitrous" tanks are really just compressed air tanks. They don't use nitrous. and they hold between 3k and 5k depending on the tank...

technically, it could work... you might have to mod the system/hook up some to accept the tank and replace the burst disk with a pressure bleed valve otherwise the disk would just blow if the pressure gets much over 1600 psi and you end up with nitrous blowing uncontrollably....