The Vibra technics gearbox mount has some rubber insulators on the mounting bolts so its not solid. I have one fitted on my car and its not bad noise wise but its spot on taking away the movement.
There was an issue with the first design as the insulators were too soft and the vibration was bad but after testing different hardnesses I think its about right.
You do get a bit of transmission noise though the car but its not as bad as the 4x4 mount for some reason.
I sell all the Vibra Technics products so PM me if you are want a price for it.
Cheers
Dan