I found a place that sells the H-D VL muffler in black... I'll dig up the link for you, though debrix might have it as well..
Bobbers are cool. There is no denying it. My problem is that every last person out there seems to be making the same damn bobber. I am a fan of the true old school bobber where the paint is still intact and it isn't all matte black. Y'know, knocking the pins out of the hinged rear fender and bolting on a tail light to what is left.
That said, I don't think, IMHO, that the Royal Enfield frame doesn't lend itself to the bobber look. It's a short bike as it is (at least visually anyhow) and the swing arm frame isnot visually conducive to the true bobber look.