yep got some on mine. off of ebay, from hong kong.
made my own bracket. from metal bought at B&Q
See my tenere review here:
http://redbikejohn.com/Tenere%20Owner%27s%20Review.htm
lots of people change the gearing by putting one tooth less on the front. this throws out the speedo though. you can get a 'speedo healer' but this only chnages the speed reading but the trip counter remains the same for some reason. not tried it myself yet.