Sorry for the post, search facility seems to be playing up but I am looking for info on the 400SE diff mounts, its the upper rubber mounts that connect the diff frame to the chassis. Are they TVR parts or from another vehicle.
If it's the one's I'm thinking (above the diff, with 2 bolts holding the diff mount in place) then you can get them from RT Racing or TVR Car Parts. Both are similar price at about £25 each plus VAT/delivery.