I too am on the lookout for one, nothing fancy pants like the one you are watching, infact I would prefer an old rusty one and I would paint it black as I think a silver one is a bit of a distraction when looking at the bike, a bit like those thou owners painting their rear pegs black for the same reason.
There was a thread a while back that I canot find about covers in that some just dont fit very well and need abit of bending- fetling too get them to fit nice, I would like to see that thread again for some advice on the best fit ones