These things can't be that hard to make! *runs and checks mcmaster* :mrgreen:http://www.mmr-direct.com/Pictures/RX7/FC/Mounts/engmnt2.jpg
Mounts install in place stock rubber engine mounts. Feature an Aluminum core incased in UHMW. Fully threaded rod extends all the way through the mount so that mount breakage is eliminated. Mounts produce more vibration than stock, but not as much as solid metal mounts. Includes new hardware.
55 bucks. Not solid but another alternative.