CO2 welding companies in Bloomington-Normal

Hello,
Can somebody recommend a welding company in town that fills cylinders with CO2? Please let me know.

Thank you,
Edgar

How big of a tank are you looking for? We don't fill but we swap tanks. I work in Roanoke but live in Bloomington. The only problem is most of our tanks begin at 20CFU (cubic feet) which is larger than most use for their c02 bubbling systems.

My cylinder (Zebra) is for 5 lb, my tank 35 gallons, so it should last for a long period of time.
I could get a filled cylinder from Praxair in exchange for my new cylinder.

Thank you,
Edgar