From what I hopefully understood in this thread (link below) the 105c and 105d are very similar but with a few changes. It was evidently a creation of simons at convoy flashlights. Others have reprogrammed them so it can be done.
I found a little more info here. I need a help with NANJG 105D driver program.
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Edit: I missed the important part of your OP, you wanting to create your own pcb’s like the 105d. That’s why you need the schematic :person_facepalming: .
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Maybe this could work for you? OSH Park ~