Not clear which country you are wanting insurance in. Here in the US I use Haggerty for all my Morgans (including the M3W), they have young drivers coverage. Both my boys were insured to drive the Morgans from the age of 18, not cheap. Once they reached the age of 25 the price became reasonable.
Odd... I have a 1976 Goldwing Ltd with Haggerty so naturally called them and was told they did NOT insure M3W's. So I added it to my other motorcycles policy with Progressive. Unfortunately did that before I got a quote from Grundy which would be cheaper.
Have to love insurance.... we have 50 states and everyone of them is different
