Concept Images For New Firearm

I own a ammunition manufacturing company that is looking to potential expand into firearms manufacturing in the near future. I have designed and conceptualized a new type of shotgun that would be the first firearm in a line a firearms to utilize the concept I have come up with. Eventually I will need to do all the CAD/Solidwork files on the firearm itself to bring the concept into the prototype phase but I need more concept images to pitch to my partners on the idea. For this project I will need a 2D concept images of different angles of the firearm. Because our market is very competitive we will require whoever does this concept images to sign a non-compete and non-disclose. We will also ask that the concept images are not used in a portfolio until the patents for the concepts are approved and the prototype has moved into the production phase of this project. Details will be given after your design portfolio has beed reviewed and we vet the bids on this particular project. Thank you.