Forgot to mention, I'm still using my 80's vintage brake levers, so no STI-specific parts are likely to work. Retroshift + Sprintech looks like a good solution, but I really like my bar ends, and that's another $130 I'd rather not spend. It's not clear from the website how the Blackburn mirror is attached. Is it just held on with Velcro? Thanks for the ideas, guys. Keep 'em coming.