Where can I find these things? Both of my right wheels are missing the metal cover that keeps the brake dust from getting on the outside of the wheel, makes the wheels turn black.

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1985 300D Turbo ~225k
2000 F350 (Powerstroke) 4X4, SWB, CC, SRW, 6spd ~148k
1999 International 4900, DT466e (250hp/660 ft/lbs), Allison MD3060 ~73k