Could you stick the guts of a mouse you like into a shell you can live with? Hot snot, CA, solder and a dremel might be all you need to get started. You could

Could you stick the guts of a mouse you like into a shell you can live with? Hot snot, CA, solder and a dremel might be all you need to get started. You could always 3D print later once you know what you want. Good luck.