Colt Commander .177 convert to CO2 tank

Hey all,

Does anyone know if it is at all possible to convert my Colt Commander .177 from using those super-lame co2 cartridges to something like a paintball gun would use? Possibly even something better than CO2. It's a blowback (which I love) but im only getting around 41 shots off before the gas is depleted. Please, any suggestions to get as far away from cartridges as possible is much appreciated!