Customized 1:8 Scale Motorcycle Parts

I need 1:8 scale motorcycle parts customized based on specific changes.

I'm looking for someone USA based to help with the following:
- Parts to customize: Frame, springer, and wide glide front forks
- Specific changes: Altering dimensions and adding custom designs
- Design: Scanning would help, but rough sketches are certainly possible

Ideal Skills and Experience:
- Proficiency in working with scale models, especially motorcycles
- Strong design skills to translate rough sketches into workable designs
- Experience in altering dimensions and adding custom elements to existing parts
- Familiarity with materials used in scale model construction and ability to 3D print prototype.

Please provide a portfolio showcasing similar work.