Maybe contact the guy from here (Goldjunge_Chriz). In his post it says the max size is 120x80cm to ship to the UK. Maybe you can ask him if he can make an exception.
It’s not cheap (way too expensive for my taste) but the results look spectacular. Additional to that it is thin and therefore light.
Maybe he’s able to ship to the UK if you pay extra. Should be still below 500€ altogether.