Hi Streets Still Works,
It sounds to me that you are looking for a high quality gain stage. One without the RIAA equalisation, that gives you the desired input impedance and the gain.
The Muffsy MC Head Amp is such a candidate, please contact me on the Muffsy web page for more info on the modifications needed
EDIT: The CNC without the RIAA filter will give you way to much gain. It can be used with modifications though. You need to remove everything between the two op amps, including the 16k resistor, then connect the output on the first op amp directly to the input of the second one. Change the 100 ohms resistors in the first gain stage with 360 ohms, and you’ll get the right amplification.