some scuba stores can also places like sports Chalet have compresors that can fill up to 3000 psi. if all else fails they sell adaptors that u can placve on a scuba tank to fill it ur self. also a local proshop MAY have amethod of filling tanks
If you have access to the fire station equipment make sure you get authorization from the Station Chief for your tanks to be filled. Also be aware that you may need some adapters in order to fill your tank. Getting permission is the biggest and most important step though as fire stations are town/city owned.