All the local places that sell beer making supplies refill co2 tanks here. I've filled my tanks at a local store that sells paintball equipment too. the best prices around here though is a place that recharges and sells fire extinguishers and a soda bottling place. most any place that uses co2 in the products they sell will refill tanks. if you can't find a place call a local beer distributer I'm sure they will know a local place where people get their co2 for beer kegs they sell.