They 2 rubber bushes (think 20 & 26) are obsolete from vw.
When I tried to get them from my local dealers, they gave me a few places that still had stock. You could try that route.
I got some bonrath ones from Phil J, little bit harder than standard, makes the back end feel alittle tighter, not sure its me or not though (had some other suspension work done at the same time). Should last longer than the vw ones too.... Not that they wear out that quickly, but should keep stiffer for longer