You may have seen a few of my posts complaining about the Yanmar dealer system in the US before. The system in Europe
apparently does not have such idiotic sales restrictions. I was forced to choose between $44 per day on the hard
waiting for a part to be shipped in from Japan
the part in the UK on line and paying $35 for fedex overnight shipping
from the UK. If you are in the same situation it may be worth the $35 to get your seal quickly.
Here's the link to your seal kit.
Yanmar - Mercruiser - Vetus - Racor - Separ - Spares & Parts - Online Shop - Sales & Service