I had the engine/gearbox mounts changed today at Abbey Motorsport. The bag labels say TRD, but the parts are stamped Subaru, so I guess they are identical to the STi parts.
The new mounts are a whole world of difference in terms of handling. The chassis feels tight and precise, there is no jerkiness on pull-away and the whole car just feels more stable and better planted. This is what was needed to complement the Bilsteins. There is no more gearbox noise than before. It was a very worthwhile upgrade for the cost.