Annotation Measurements for Prototype - repost

Hi I have a prototype toy that I will be manufacturing in China. I have created the prototype in Maya, and can export it as .OBJ or FBX This file needs to be imported into some CAD software or alike and all measurements done, with annotation. The prototype is very simple with basic geometry There is two separate .obj that will need to be prepared for production (molding) (simple Models) We will work together with the annotations. The completed files must be exported in STL, STP, and DWG The files MUST BE ready to be sent to the manufacturer so they can start the molding process. Only apply if you have had experienced in developing a prototype to this stage. Cheers Nick