1/64th scale fire truck kitbash parts

Hi! I'm looking to have 1/64th scale fire truck and ambulance body kitbash parts created for a project I'm working on. The parts I need include the cab and body, some defined features, but I'm open to suggestions. I prefer all parts to be built with a 3D printer. I'm looking for someone with experience in designing STL files so i can 3D print with my own printer custom parts for models and model building projects. I'm hoping to hear from anyone interested in this project. Thanks!