3D modeling - Looking for an expert 3D artist to build Helmets and for 3d printing.

I need an expert of 3d modeling to build 3 different helmets for 3d printing with high quality and details. I need them to be scalable to fit any size. I need the files in .stl or .obj and also some renderized images of each helmet. If a renderized video of the helmet is possible I could pay more. I attach images of a previous job that was perfect, that is exactly what I want.