I installed an 12v 150 psi ARB high performance twin air compressor (CKMTA12) in my TV. I mounted it to the side wall in the bed. The compressor is connected to a 5 gal aluminum air tank that I installed underneath the truck. This compressor is not cheap. It is well built and engineered. It is design to meet the needs of the 4 x 4 off road community who air up and down their tires and operate lockers. I can air up my tires with no problem and can operate an impact gun and air tools if needed. Yes it's expensive but having the peace of mind out on the road is well worth it IMHO. Here the mfg website for info:
http://store.arbusa.com/ARB-On-Board...12-P21341.aspx