The possibilities are endless. Dare I say it, but look at Harley aftermarket on-line shops as the aftermarket tail light selection is very extensive. From cool retro looking cast pieces to total garbage, billet atrocities in the shape of an iron cross.
I bought one of these and polished it myself. I think it looks great. I much prefer polished alloy to chrome. Mail me off list if you want a shot of what the taillght assembly looks like on my bike. I think it is a huge improvement over the original!