Hi there,
This is Bogdan from Romania.
I'm a mechanical engineer, specialized in the industrial robotics, 3D modeler and designer.
I have over 15 years work experience, designing, prototyping and launching different devices/systems across multiple industries.
I could help with your project, but I really need more details/info about.
Which parts you need to design and which ones you need to modify.
For the new part (which to be designed) what material do you want to use?
More important questions: for which moto you need the parts, and if the parts are for the external elements, what style do you want?
For any other questions, you may open a chat room here and we'll discuss about the details.
Regards
Bogdan