I am in the process of installing an optical ignition system in a '74 Dino 246 for greater reliability. Unfortunately the coil is a silver Crane Cams coil, and replaces the blue Bosch unit. While the ecu can be easily hidden the coil looks out of place. What can I do to make the coil look stock? I could paint it, but it's an unusual gray-blue color and I can't find any Bosch decals on the Internet. Any ideas?