create stl 3d file

I am looking for a freelancer to create an STL 3D file for product design. I have a rough idea of the design and need assistance with creating the final 3D file. The ideal freelancer should have experience in product design and proficiency in creating STL files. The final output should be in STL format. i want a 3d Star of David as four sides of a box. The center should be large enough to fit the Israeli 10 Shekel coin inside.