Good point. I was thrown off by the first post which is a picture of the front. I have one original "U" shaped bumper left, will need to pick up the 17B947-1K kit from NPD to see if the small pieces look anything like the original - thanks Bob G I would have not looked at this kit otherwise. I did not see any other source for these.
So for the rear it looks like one of two styles, the "U" shape or domed type. That wasn't clear to me as I read through the posts, but it is now