i was wondering if anyone has a spare little rubber screw that is used to bolt down the compressor or knows where to buy them. thanks.
You may be able to get by with a regular screw and a rubber washer between the compressor and mounting surface.
I believe they are 6-32 screws. Check these out McMaster Part# 96905K48. If you have one you might want to measure the major diameter of the screw to make sure its a #6.