So, with the help of this thread, I'm building a silent compressor. Here's the components.
A compressor from an old thrown out air conditioner:
An old compressor that someone ripped the motor off of. The tank, pressure switch, electric lines, pressure relief, and pressure gauge are still good. I'm not 100% sure of the capacity, but I'm estimating at least 20 gallons:
Total cost so far... free!