Design Sweeps, Screens for John Deere Bulldozer, and Tailgates for Terex ADT

We need someone who is able to measure and design screens sweeps for John Deere Bulldozer, Also we need to measure and design tailgates for Terex Articulated Trucks, that will be measured from the tailgates. Needs to be very accurate and detailed, have experience in construction machinery attachments, we need to be accurate. Needs to be in Houston area or Los Angeles area