Does anyone know the part number to the Springs that go to the H&R Sport kit [31003-1] that has the drop with shocks {2.1F & 1.7R }; Or if anyone has a set of springs they want to get rid of " $ " as long as they come from that kit. Has anyone tried throwing this on a set of sport billies? If so what was the drop, and how was the ride? I'm trying to find springs that will roughly put me around a 2" drop. 