I recently bought a 22cuft nitrogen tank from beverage factory (Nitrogen Air Tank - 22 Cu. Ft. High Pressure Aluminum Gas Cylinder | BeverageFactory.com). I go to school in vermont, but live in new jersey. I tried going to airgas in vermont, but they told me they only swap tanks, and they would not have the same size to give back to me, and the price was ridiculous. I came home to NJ for a few days and am having no luck finding a place here to fill it either. Airgas in NJ told me it was too small and i wouldnt get the right mixture, and another place told me that they cant put nitrogen in an aluminum tank. Does anyone have an suggestions as to where I could try in VT or NJ?