Just bought a full set of coilover from local guy here but the problem is one Of the rear is missing one spring perch ( not sure if I call this right ? ) but if you guy have one laying around ...can I get it from you ? All the spring perches are the same ?

This is what I need ( no need the black gasket but the cheery one

 

These aren't universal parts that interchange. Different manufacturers use different thread pitch and threads per inch etc. Identify the manufacturer and go com there.

 

Oh man....