Convert STL file (or 3ds Max) to STP or IGS file

Closed - This job posting has been filled.

Job Description

I CURRENTLY have a design created for 3D printing. I now need to provide to manufacturers for a rubber mold. They need STP (Step) or IGS files.

To be clear:
I have already gotten 3D print from the 3DS (STL) file. I need this converted or reworked into a form that manufacturers can accept.