I repaired and maintained small instruments and machines in the Navy's nuclear equipment refurbishment 2S program. Pins, roll and solid, are a mature and reliable technology. Whether a manufacturer adheres to standards is another question. I don't recall ever having to modify or custom make a pin and doubt that it could be successfully done for a roll pin.
The point of making roll pins from spring steel is to allow their reuse. I still have my personal copy of Industrial Press's Machinery's Handbook.