ALTERASTRO--- Go to www.CampingWorld.com and then do a search for: "Wide Angle Lens"
At the website you will find two(2) vinyl freznal lens models that stick to the inside of the rear window and greatly magnifies the road/traffic behind you. There are many of us VX'ers here on this forum that have this exact item (myself included) stuck in the rear window and it works great.
Camping World also does "International Shipping" across the pond.
Which size works best? Looks like they offer an 8x10 and an 11x14. But it seems like you'd have to cut it to fit the curve of the door in either case right?