I'm hoping you know the purpose of rear view mirrors. Just in case you do not, rear view mirrors allow you to look behind and not enter/ cut into a lane when there's another vehicle coming behind you on that lane. In other words, It stops you from creating nuisance for other people on the road and act like a dimwit who doesn't care about safety of other people on the road.

Why not go the entire length a remove the tail light, headlight etc, replace them with some non functional decorative piece so that the bike looks better, since you seem to be in total disregard to safety and traffic rules. There's no limit to modifying the bike if you decide to not stick to government's rules.

Always wise to strive for better looks while staying within safety regulations.