I got it at a local bicycle shop. They're pretty common in the bicycle world.
Yes, back lit would be awesome, but bicycles don't have an electical system so you won't find one with that option. Now if someone would start making these specifically for motorcycles that would be great. Of course the price would probably be $200 instead of $20.
I saw the pic (cant remember whose it was) of the led that was mounted in the console to illuminate the clock. Unfortunately that won't work unless I could figure a way to mount the sigma down where the clock was mounted.