SLIME makes several 12 vdc compressors for under $100. Any auto supply store sells them. I have one that fits into one hand and can pump 100 psi. Used it three weeks ago to top off an ELR tire to 80 psi. I bought it 8 years ago to carry in my motorcycle trunk and it still works fine.
2013 Silverado 2500 HD Duramax/Allison Tuned
Aviator Wright Flyer #1919
"First In, Last Out". 11B4Y
DAV, MOPH, VFW, 5/7 Cav,1/8 Cav Assoc.
11th ABN Pathfinder Co. N7MIP