Fire Department to DIN Adapter
Click to enlarge image(s)

Most Fire Departments including Rural Fire Departments have compressors that output to 5000 psi that they use to fill carbon-fiber fire-fighter tanks. Be sure to check first to see if they will fill your AirHog Supreme to 4500 psi with compressed air. If so, order your Fire Department to DIN Adapter and take your AirHog Supreme to have it filled... and don't forget to take a box of donuts!