PMM make custom 3D printed shells that take inspiration from popular gaming mice. Ausmodshop are stocking the most popular PMM MOD KITs which make use of the Logitech G304/G305 internals.
The internals are a combination the highest quality components, switches, magnetic battery charging tech and make use of Logitech lightspeed wireless technology from a G304/G305 PCB (not included).
more info here
PMM Pro Collection P-SL ST (Starlight S Inspired) MOD KIT
PMM Pro Collection P-GP ST (10% Smaller Superlight) MOD KIT
PMM Pro Collection P-303 (G303 Inspired) MOD KIT
PMM Pro Collection P-VP ST (Viper Mini Inspired) MOD KIT
PMM Pro Collection P-XM (XM1 Inspired) MOD KIT