Okay, thanks. I don't check this often. I'll get with a dealership and ask for them. My car is white so I may spray paint the caps black then wipe off the top of the design so only the background is black against the dark gray wheels.
I apologize if you are getting this message twice...I am new to this and not sure if my other reply went directly to you. The center caps are from the Toyota dealership. They are plastic and come in two sizes, these are the small ones. I think they are the same ones used on the other type of Prius wheel. Cost was about $12 each, a little pricey for a small piece of plastic but made the big difference for sure. The trim rings are from a company called Auto Amenity online. Just an fyi on those...since the wheel is alloy and not steel the edges where the clips attach are a bit thicker. The rings were not the easiest thing to get on (okay, I am a girl here) and required a rubber mallet and there is a small space between the ring and the edge but you only see it if you standing close to the car. It wasn't enough to bother me because from a distance and driving they look great