One thing people haven't mentioned is you could create synthetic images via 3D modelling. If you can get someone to set up realistic 3D models of those microchips, and then randomly generate cracks, you can get a pretty good baseline model you can then finetune on real data.

There are companies which could do that too but I'm not that sure that the price would be approachable, or if outsourcing it is a viable solution given trade secrets. But ex. Datagen is a company that can do it.