small planetary gear designed in fusion 360 and or similar 3D modeling program to create .stl file to fabricate by CNC .

I am looking for assistance to design a planetary gear, made of plastic, with a diameter of 5-10 cm. This gear will need to be designed using a 3D modeling program such as Fusion 360, and should output to a .stl file for fabrication by CNC. The preferred deadline for completion of the design is within a week. If you are able to assist, I would appreciate hearing from you. Thanks!