Hard core off roaders seem to gravitate to the Viar, or ARB. But thinking the later is mounted. The berries is have on board air with a quick coupling mounted in the grill. Run a hose off that, even a quad hose that tops off all 4 tires at once.
Viair offers on board mounted
If you have the good location & don't mind scaring up $$$$
ARB on board runs $700 ish.....
https://www.viaircorp.com/new/continuous-duty-oba-system
