I am searching direct factory supliers which manufactures Heavy Duty Air Brakes components for American and European system Trucks.  My main search is concerned with Bendix Compressor TU-FLO 550 and TU-FLO 750, Midland 2 3/4 and Wabco, each for several applications.  I am also interested in these compressors spare parts and repair kits.  It is very important for me to have a very clear idea about your general policies (warranty, after sale service, payment, deliver and so on).  I will be expecting for suppliers information so I can study and consider it, so please avoid sending information about different stuff.  Thanks in advance, and greetings from Mexico City.