I do wonder how good results you could get with a good capture setup, good macro lens, and high-resolution DSLR. Of course combined with state-of-art software. By the specs something like Canon R5ii + 100mm 1.4x macro should get up to almost 3um per pixel resolution; intuitively that should result also very high detail 3d models. Managing depth of field might be a problem though.

Cannon pixels are still pretty big. You could use an astronomy camera and some lens adapters to get better sampling.