The omp rear strut brace is one of the cheapest avaible(I have that one

) and it's only avaible in yellow.
If you want a good looking rear strut brace you will have to look at cusco ones in aluminium, around 100£ or carbon fiber, around 200£!
There are some other brands that do aluminium strut braces that are not really expensive, around 50£, but I don't have any details.