Mike you have two rims on the passenger side with clips for hubcaps. I've got two Hubcaps with an inner ring of 8 3/4". Measure and see if this is what they go on. Picked them off the counter of a yard outside of L.A. Got them cheap cause they didn't care what they came off of, but I can't use them. They do not go on my 16" rims nor my 17.5" rims.
Cap on the left is for a 16" 6 stud wheel, the thicker one on the right is the mystery cap.
Backside view 16" left, has 7 5/8" inner ring and the mystery cap right, has 8 3/4" inner ring.