You have to remember that any bushing in the original stock location will be subjected to linear forces. Those forces would most certainly cause the squeaking sounds. I thought about making the bracket to utilize the stock bushings but soon realized that it would not be an easy task. I am also not convinced that the stock bushings are a good design. That lining is not designed to hold grease, as a matter of fact, Mazda recommends them to be installed with NO grease. IMO the grease increased the rate at which the lining breaks down. I know this because when my stock bushings began squeaking I added grease and within a week the liners were torn out.
If you really wanted to use the stock bushings just take the bushing brackets into a machine shop and get them bent to a 90 degree angle.
If you really wanted to use the stock bushings just take the bushing brackets into a machine shop and get them bent to a 90 degree angle.