Hello,
Scott from Mamemarquees.com uses some amazing material for his overlays. It's very tough and thick. If you install it and it's not aligned properly, it can withstand several peel-offs and and re-applications.
They are worth the price of the extra shipping to the UK.
Looks like shipping to you via USPS would be about $36, which is $30 extra over a USA delivery.
Well worth the price IMO considering how much this hobby can cost.
Jack