The 8 and 10 gallon Harbor freight compressors are pretty good. They are oil but it's nothing to be afraid of and will out lass oil free and they go to 125psi. I have had an 8 gallon for well over 5 years. Whatever you get it will be made in China.
Like LRS said The moho has one for the brakes and air bags. There should be an air chuck at the front. It's there should the rig need to be towed.