There is a very talented bassist named Oscar Stagnaro who actually will teach lessons online via webcam. I don't know what he charges, but he is the real deal.
You can contact him here at his website:
http://www.oscarstagnaro.com/
Also, I've heard great things about the Ed Freidland Instructional DVDs which might be worth checking out. Otherwise, ActiveBass.com is a nice resource.
http://www.activebass.com/