I have a Marsee brand mini bag on Blackie between the tank protector and the cap.
Although the following ad calls it a 3 liter, I believe it is a 1.5 liter, very small but very handy. There is one used on Ebay at the moment, Link Removed
you can find it on a few websites... I bought mine from motorcyclesuperstore.com took along time to ship here across the country though. I think I saw one on madss.com after I had ordered mine...
anyway, it seems to be a pretty good bag
It's even better than that, I used the old black permanent marker on the small reflective area on the bag that was silver, and it's still reflective! **** rain cover is silver though!