Here is a smaller compressor from VIAIR:
Direct Comparison:
Kit compressor
12v,
0.79cfm flow rate,
120psi continuous pressure,
120psi maximum pressure
COTS
cost: in the KOP
Weight: 4.3 lb
VIAIR 63C
12v
0.79cfm flow rate,
100psi continuous pressure,
105psi maximum pressure
COTS
cost: $35
Weight: 1.43 lb (Its a third the weight!)
If we ask the GDC, I'd ask about this one.