Create a part (Autodesk Inventor)

I have a part that is created in Autodesk Inventor. I have a step file of the part. What I need is for someone to design a case or holder for the part that I have created.

Example of the type of holder I want created. It does not have to be exact I just want something simular

https://www.amazon.com/gp/product/B01LZKQKKE/ref=ox_sc_act_title_2?ie=UTF8&smid=A11DRI8ZVVGDX8&th=1

Step file I created:

https://drive.google.com/open?id=0B7f7htLyCnEpN0p2QXZvWEVLNk0

png of the part I created

https://drive.google.com/open?id=0B7f7htLyCnEpYjAySzN5WG5pU3M