Upvote:3
https://www.hertsinsurance.com/walkabout/
Cover valid throughout EU and other countries.
Cover available for Campers including Vans Cover for periods ranging from 14 days to 1 year
No permanent address needed - documents can be sent by e-mail
Overseas driving license acceptable, including Australia, New Zealand, USA, Canada, South Africa and other selected countries
Surely they can insure a normal car similarly.
Emphasis added to the USA by me -- it's quite rare, many will sell this Aviva policy which does not include the USA.
The Aviva link now (19-Jun-20) opens their quote page which takes you to the DayInsurance quote page which requires a UK or EU licence