Does anyone know what (if any) hub cap fits on a 17.5 wheel for the '62 F-250 stakebed? There are a few raised bumps on the inside of the rim closest to the lug nuts that appear to accept some sort of cap, probably with an inner ring on the back side of the cap. The inside diameter is about 9.25". The front grease caps protrude about 3", & the rear hub, about 4". I remember seeing a cap with a cutout for the rear hub, & think the front would have "FORD" on it. Thanks, Art