I need a 3D designer

I have a aircraft design, only an exterior design without internal components such as the cockpit or due systems and etc… I have the designs depicting multiple views of the aircraft but I need them in 3D to continue my work. I will need the designer to fill out a non-disclosure agreement with the promise to not sell or discuss the aircraft because one day I would like to actually build the aircraft. Unfortunately I can’t afford a patent which is why a NDA is required.