Dupli-Color is good. When I had the Bonne and was searching for my paint color, Dupli-Color was the only one I found that had it...which was a bit unfortunate because I prefer Plasti-Kote (not really sure why, I just do). But it was an exact match. I used it for the eyebrows I made. If used correctly and you paint with the proper procedure (BC/CC, proper drying time, sanding, polishing...) it looks just fine. If you plan on painting an entire bumper though, I wouldn't use a can of their paint...it would be very hard to get a factory finish with such a small spray width. For big jobs I would go to a body shop.
I recently got Dupli-Color'* Caliper Paint kit. As soon as I get different rims that show the calipers, I will be trying it out.