dump truck [no factory] air supply question

found a 42,000 single axle dump truck with a pintle hitch. no trailer air supply though. looking to the future, i'd eventually need to tow a 20 ton trailer with air brakes.

truck i found is a 2008 sterling 42,000 gvw.

can i add a air supply for trailer? where would i have this done? sterling has went out of buisness

dump truck [no factory] air supply question