Look at a Neuspeed, ECS, etc torque insert and you'll see that it has the part number 15.1106 stamped on it. It's an energy suspension part number which you can purchase from them or one of their distributors directly.
http://www.suspension.com/volks.htm $13 +shipping.
Part number for the corresponding OEM stretch bolt which should be replaced: N 105 580 01 = $2.75 retail from a dealer.
Hope this helps. (I have a Neuspeed, the above pictured is VF from my VF mount kit . . . . they're all the same mount)
Dave