there are a bunch of aftermarket replacement air shocks, i used these;
, just because they are cheap and i dont care if it handles like a race car. it ended up handling the same as it did when i bought it. after a break in period that kind of feels like the wheels are solid mounted to the car. as far as the compressor there is this monroe air line kit that has the proper connectors to go to both shocks and adds a bicycle type filler valve.
1998 Bonneville SSE
2007 Monte Carlo LT-KYB, Clarion, Polk audio, Kicker
1999 Yukon SLE-KYB, Air lift, Reese dual-cam, Tekonsha
1987 Firebird-355/th400-nothing stock