Don't know if this would help or not. I had an old Marantz wood box from the 70's. It fit another model just fine, except for the rear feet didn't line up but the front feet did.
What I did was to screw down the front feet into the receiver only. I then just placed the rear feet into the recessed cutouts for the rear feet.....unsecured. The unit was in an entertainment center....it worked just fine.
