Check with Andy or Chris at the Bass Cellar, they could probably turn you on to someone. 513.661.6224
I would highly recomend James Lambert from the CSO, Al Laszlo teaches at CCM but has some strange ideas although he is himself a good player. Other guys from the CSO that just got their jobs and therefore should be in the cutting edge are Matt Zory and Boris (I forget the last name). In conclusion I would go to Lambert or Zory. Unfortunately I have no phone numbers. I dont know what you are looking for but for a virtuoso soloistic approach Rick Vizachero also from the CSO.
I know of Jon Dean in Cincinnati. He's a great guy; clear, intelligent, and not intimidating at all. He's more of a jazzer. I don't know what style you are looking for. Email me if you want his number. I can't find it right now...