My designs done in 3d CAD,

I have a idea of tool less furniture with a jig saw element to it, i have made 3d drawings in google sketch up however I will need 3d CAD drawings for 3d printing. I will need every part done individual and in the file formats of dwg, pdf and step or IGES formats please. What I am looking for is clarity in my designs, so when I show the design to the guys at the 3d printing shop its very straight forwards. To get started I will need you to sign a non disclosure agreement before I send you any thing.