Well, I'm mulling over giving a GL1500 set (P/N 06410MBH000) a try...
Their shape/dimensions appear identically, plus have the aluminum bushings already inserted, possible even vulcanized...
And they come for like € 80,-... the
set, all
five,
including those inserts...
(5x 41241MT3003 + 5x 41242MR5000 for the ST1100 will cost me € 186,-... )
Also ze GF's NT700VA uses hub dampers and bushings of same design and size as the ST1100... fully interchangeable, only reversed as the f/drive of her Deauville is on the port side...
(06410MZ0A00 damper set wheel + 5x 41242MR5000 aluminum insert for the NT come for € 168,60,- ... the rubbers are visually identical to the ST parts...)
Only the Shore rating of the rubber might differ, vehicle weight/loads...
I used aftermarket hub dampers in the past, felt a bit softer, wore faster then the OEM ones...