i have tried to buy those belts direct from Dayco for years.
They did not sell to private persons
The belt is listed in their spare parts lists, but most of the traders i have contacted did not know about the belt.
They only sell car stuff
Meanwhile i have contact to someone from the gileraclub forum who is selling the belts.
So if you are not able to find anything ....
Take care not to buy something which is several years old.
So maybe ebay ist not the best source
Part # is Dayco 94795
ciao Joachim