I have a pair of
CRG Hindsight Bar End Mirrors on my TBS. Switching to bar ends GREATLY improved my view of the road behind me. I did have to move the throttle assembly inboard 1/4 inch to prevent the throttle hand-grip from binding on the mirror. That required drilling the handlebar to accommodate the placement nub on the throttle assembly.
Another option for the same mirrors is custom bar-ends like Brains had made. (
Link to Brains Photo Album) I really like his setup, but don't have the capability to fabricate my own and imagine the setup cost to have them made would be a bit high. (I would be willing to pay Brains to make me up a set. Are you listening?)