Unfortunately, Audi doesn't sell just the plastic shoes...lots available on eBay and that's where I picked mine up. Kind of hit or miss on these...I tried the RKX ones to support a US based business, but found that they did not fit correctly. The issue with them was the area where they snap on to the tensioner, it was more rounded and not squared off like the OEM and wouldn't stay put to my satisfaction. Good thing I guess is they are cheap if you don't like the first set that you find. I also sprung for the Audi tool...about $25 I think from Europa, but no issues with it cracking to pieces like the cheap copy that comes with some of the shoes.