Model (Source) bones

Good day everyone,

I am working on personalizing the knee. However, there is a small issue. I am using TLEM2.0 dataset to personalize the lower extremity (focusing on the knee ONLY). For this case, certainly, I might have patients for which their either right or left knee is to be personalized. In this case, I need the model (source) STLs for the right side and for the left side. In the model I have now, only the right bones are available while the left side was mirrored. Is there a chance I can find the STLs for left side directly? how?

Thank you in advance.

Best regards,

The same surface is used for both right and left side. It is simply being mirrored.