You can't raise a single string (except applying some epoxy to the slot, but then the string might jump out of the slot). 9 to 10 mm is a good height for an E. Maybe try to get lighter strings (Spirocore Weich 4/4 S42W or synthetic core strings like Innovation Braided 140B) for your instrument. You can even mix these two sets if you want. The Innovations are better for bowing and the Spiros a bit brighter and better for pizz. Good strings if you need to build up the power in your hands, because you are not used to higher tension double bass strings.
The S42 on a 4/4 with a high action could be hard for a non-trained double bass player. Many years ago I had the same problem with power (could only play one set with S42 and a high action).
You can put some layers of veneer under the e-side brige foot. Not ideal, but the best really cheap way. Adding adjusters (and explaining the luthier who does that, that the action is a few millimeters too low on the E) is a good way to solve your problem without needing to get a new bridge (which is more expensive than adjusters). But then you need to lower at least the A a lot and the D a bit too, with adjusters everything except the E.
Last edited by DoubleMIDI : 10-20-2013 at 09:01 AM.