I remembered that someone had done at least one V5 wallpaper and I tried searching the forums for it without any luck. So, I went to my hard disk folder for wallpaper and looked at that wallpaper’s properties to see when I downloaded it. Using that information, I went back through the General Forum to May 12th and found the post for it.
I think it is a nice wallpaper but you may not. It is though, an Avast 5 wallpaper and the only one I know of on the forums. You can find it at the link below in various sizes.