3D printable STL for Production Line Machine

I am looking for a 3D modeler who can create a 3D printable STL file for my large production line machine. The purpose of this machine is for 3D modeling. I require the use of PLA material for the 3D printing process. The ideal candidate should have experience in 3D modeling and printing, and should be able to work with large dimensions (more than 3 meters in any dimension).