328 GTS Rear roof clip rubber

[The Dog]

I am looking for the rubber piece on the rear roof clip for a 1989 328 GTS.
Have seen the full clip at Eurospares for £128, but was hoping to just get the rubber.

Any ideas / advise welcome

couple of photos attached to help explain what I am looking for.

Thanks

Mark


Clip with missing rubber


Other clip with ruber in place