I have an 04 that I've been slowly going through and replacing suspension items to try to get back to a "new" feel (Mazdaspeed shocks, Racing Beat springs, shock bushings, bump stops, sway bar bushings, end links, differential bushings, etc.). I've been trying to research subframe bushings. All I can find is Essex Rotory in the UK is selling slightly stiffer than stock rear subframe bushings and RE-AMEMIYA rear subframe bushing collars. Is there not a domestic market for this kind of product?

Also I've seen conflicting information that the front subframe has bushings and/or it bolts directly to the frame. I found STIFF RING SUBFRAME RIGID COLLAR on ebay. It's supposed to fill the gaps between the chassis and subframe to align the bolts and bolt holes. Anyone have any experience with these?