If you order a boomslang harness with an extra 12" of wire over what they normally make them, you can remove the center speaker and mount it in the hump that seperates the two seats, then run the USB cable into the center console or along the side of the center console to beside the passenger seat.
I had mine there and had no issues, the center speaker does little to effect the stereo and unless you have had your sub-amp rebuilt it may not even be working now.
Dave