[strictlypersonl]

It would take a pretty weirdly shaped intermediate to substitute for the rubber bushings. You might be able to shim the current setup to take any play out. If you actually have the Subaru gear (as opposed to the modified equivalent Mustang II that we supplied for a while), we've got some replacement urethane bushings, but they are only slightly harder than the Subaru's rubber.

The major alternative is to change to the later rack which uses Mustang bushing-type mounts. That would require torching your old mounts off and replacing with new brackets, plus a new lower steering column.