Does anyone have one?

I purchased a PEAK 300 AMP one from a hardware store and that basterd didn't even work after following the directions.

I'm thinking of getting another one with a compressor.

Anyone know of any good ones?

I'm lookin at a Cobra 500 amp one with compressor for around $100.

 

Speaking of compressors. My 78 F250 Highboy has what I think are factory dual air horns. Chrome and they say FORD on them. They are mounted under the hood on the drivers wheel well. The compressor unit has bad seals and does not fill the tank anymore. These babies are or were LOUD. Does anyone know of a source of rebuild parts for this compressor? It's not one of those dinky red small setups. This is all FORD. If anyone can help please let me know.
Thanks!