Need to replace Mamba motor in FLM Rusty

[dadgummit]

In the pictures it is one of the white wire esc's which I think means it is one of the earlier models if the quark. Where can I get the piece of aluminum for the heat mod? Can Mike mill one up for me? Also should I replace the piece that is in the middle? Please keep in mind that Dean's plugs are about the extent of my self taught soldering ability. Can the mod be done without removing the motor wires?