I do not think you can do this but you can cheat a bit this using the visual brush. If you want an example, I use that technique in my
PolyStar - WPF Polygons and Stars article.
The article works with a graphic object but in your case you could probably have one real on that you move around to be the one that is being interacted with and the rest could just be rectangles. It is a bit of work but this is a high performance solution. I hope this helps.