Less than an hour after the call, I got an email:
“This message was sent to you at the request of HornBlasters, Inc. to notify you that the electronic shipment information below has been transmitted to UPS” 
An HA-540 onboard air system and valve kit for my newly acquired Old Cast Nathan P3!
I’ve only been able to blow the horn in my basement using 1/4" air hose and 80 psi so I’m anxious to get this set up and hear the full potential of these horns.
Mounting them on top of my wakeboard tower on my boat so I can honk to my hearts content out on the lake. I’m afraid with my road rage tendencies that putting these horns in my F-150 my be a recipe for jail time :eek:
I’m custom making the bracket for my horns so I can remove them easily and quickly so I’ll post install pics as I get them.
Man I love the sound if this horn!