I'm piecing together a set of 22.5 wheels for my 06 dually and wondered where to get the rear center caps.

 

You can always check Loves, Flying J, or any of the other truck stops along the way. Also try doing an internet search for "chrome shop" and buy online. I finally got tires mounted on mine, I am in the process of finding top hats, trying to find ones that doesn't utilize a beauty ring to hold it on. Good luck

 

I just replaced the front center caps on my 22.5's. They were chrome and starting to get rust spots. I went to the local Kenworth dealer and they matched them up for me. They had both chrome and stainless steel. They were 5 bucks for the chrome and 13 bucks for stainless. He told me they had all sizes for the rear also. My rears still look good, but I will replace with stainless as needed. Good luck in your search.