Another part broke off my bike, this time it was the connector for my light:

I initially tried using TPU as a replacement, hoping the flexibility would help absorb the vibrations and impacts from the road. However, the TPU 85 was far too flimsy:

After researching which material would best suit my needs, I compared a few options:

• PETG: Generally decent, but prone to fatigue and breaking over time.
• ASA: Excellent UV and weather resistance, high impact resistance, and very thermally stable.
• PA-CF: The "pro" choice, stiff, weather-resistant, and nearly unbreakable thanks to the carbon fiber.

Since I don’t have experience with printing PA-CF yet, I went with ASA:

The final part fits perfectly and feels incredibly sturdy. I’m hopeful this ASA connector will outlast the original.

Thanks @AG again for letting me use the LAB to create 3d-print projects for my bike.