have a 1990 gillig chassis, need new air compressor the oem is $2000 LECO brand according to gillig mfg in hayward.There is got to be a oem part to replace it thanks all the info cannot drive it until I fix it might damage air bags and rough ride.

Try going to a truck salvage yard. They will have a bunch of belt driven compressors. If you chane brands you may need to make new mounting brakets. Some medium duty trucks had air brakes and some were Fords. Good luck.