The first row of 4.5" tiles above the worktop has a number of cracked tiles developed over the years. The rest of the tiles are still ok so I thought that I would cover the row with some thin material to give a slashback effect. Standard worktop upstands are only 3" high so not suitable. I don't want anything too thick, I even thought of plastic but where can I get 15ft x 4.5" strips of cream/beige plastic from? Has anyone got any suggestions?