I use Footman James for my 1995 ultra classic, added it to my classic policy. Would have put it on my modern bike policy with ebike where I had my 03 Heritage Softail but they wanted an extra £100 (£150 to £250ish 3 bikes) for the cheaper/older ultra! and FJ only wanted £20 (£120 to £140).
In general I find ebike competitive it seems they did not want the Ultra Classic, most other HD models seemed reasonable. A plus for ebike is no fee, other than premium change, for making a change on the policy. However a minus is only 4 bikes on a policy now.
I notice a big jump in premiums this year, FJ now £210 for 4 bikes including HD and XRV650 + 2 oldies and ebike doing a check on premiums will expect it to go up to £200ish for GS, AT and NT650V.