Marcel Erz has put up a GitHub with assorted Model I parts which can be 3-D Printed!
Currently present are:
- Main Enclosure Panel
- PCB Stand-Off
- Keyboard Stem (ALPS)
- Keyboard Spacebar Clip
- Keyboard Clip
- Keyboard Button Placeholder (Enter)
- Keyboard Shield
- Extension Interface Cover (Medium)
You check it all out at https://github.com/RetroStack/TRS-80-Model-I-3D-Objects.