Okay, I need some help with my rims. I have Momo rims Type 09100 8JX18H2. 
I have 225/50R16Z tires on the front and 255/50R16Z tires on the back.
Originally they looked like this.

Sorry about the quality of the picture, I didn't take it.
There was a ring/disc that use to cover the lug nuts and then there was a knock off that covered the center.
The outer circle is 6 5/8" in diameter, and the center is 2 5/8" in diameter. So if any one has any ideas as to what I can do I would greatly appreciate it.