If you want one that badly, write your own, but it is my opinion that they are totally useless.... If you need to use a colored rectangle, you can use a panel if you want to hold controls or the GDI+ if its just for show. You can even derive from the panel and draw custom stuff on it.
I cant think of any reason to need circles and the like, but again, you can use the GDI+ if you need to.