Unfortunately it is not a belt he is looking for.
The V-grove is a proprietary part that Simrad hasn't made in a long time. I've been looking for one for several years.
@dandelang : If you find on please post the source. Someone out there must have an old Simrad wheel pilot collecting dust that you might be able to find. There is one on EBAY listed for parts for $250.
It is a 30 but the V-Grove is the same on the 10 as the 30. But $250 is pretty expensive and I assume there is no guarantee that the V-Grove in that one will come out undamaged.
I don't know why this link says "pardon our interruption" but it seems to take you to the EBAY page with the old used wheel pilot
I assume you might have tried to "rebuild" yours as I suggested back in July but have not because yours may be too far gone.
Another alternative I have thought of is it might be possible to have one 3d printed but I haven't pursued that avenue.
Good luck