CNC G-code for Wood Shaping

I need G-code files for a CNC machine with 4 heads. The project involves creating straigh lenght channels in round dowels, to insert alluminium rails Requirements: - Simple 3D outlines and cutouts... (Budget: £20 - £250 GBP, Jobs: 3D Modelling, CAD/CAM, CNC, CNC Machine Retrofitting, CNC Programming, G-code, Product Design, Solidworks)