OEM Black rims Caps?

Try eBay or Amazon. I got mine off Amazon for about $8 and got them within 2 days as I have Amazon prime. They weren't a perfect fit but you can just add some tape for a better fit which is what I did and now they are perfect! Hope this helps

 

Yep, Amazon for hit and miss. Or the Dealer for expensive ones, but I guarantee they will fit. Some things you just gotta shell out the money for it to work. Center caps might be one of them. Over the years, I have made my own brand of center fills, only to have them fly out eventually. But if you try, you can find the right ones on Ebay or Amazon at a very good price. I was impatient and slammed down the bucks at the dealer for mine.

 

I got these: (1) New OEM Genuine Toyota Corolla Yaris Prius Wheel Center Hub Cap 42603-52110 | eBay

They are genuine items, part no. 42603-52110

They fit the 15" black wheels on my Plug-in fine - I assume the standard 3rd gen Prius wheels are the same?

 

I used electrical knock outs from the hardware store, primed them and painted them black. They look like they were always there and cost about a $1. If your interested I could get some pics of them.