You can create a co2 setup using a 10# bottle (15 or 20 if you air up a lot) with a 150# regulator, some fittings and a polyurathane hose.
Check out a local fire extinguishing store for the bottle, and online for a regulator.
Home Depot or Lowes for the CO2 hose and inflator.
Refills are relatively cheap, and the best part is, it takes 30 seconds to air up one tire.