Hmm. Maybe soon to be discontined then.
Okay, here's the questions.For the GL650 folks needing a shock seal, I would believe that this seal would do the job... Granted it is 1.5 mm thicker than the 10.5 mm OEM one but it has been my experience that there is more than enough room to accommodate it... The company also makes one the is 0.5 mm narrower (10mm)...
https://www.metricsealsinc.com/store/10250______ACLA/i_0_0_/_N 65 X 80 X 12.aspx
For folks across the pond...
65 x 80 x 12 R23 Oil Seals O Rings Circlips - Bearing King