The shaft actually appears to be dull chrome plated (like the center section of a 68-70 b-body woodgrain wheel) and the aluminum bracket is painted. Challenger 1's recomendation will probably duplicate both. Or find a shaft that is not pitted and paint the base.

Scott

70 Coronet RT 440+6
64 Dodge 330 - Future Hemi Clone
17 Challenger Hellcat - Green Go Driver
86 Buick T-Type Turbo V-6