Ken,
The Crank I believe was built by Falicon in the USA, then later when Norton took the engine away from MCT the cranks were supplied from the Taiwan supplier to a much higher standard at an absolute fraction of the cost! It really was an eye opener to see the whole quality from manufacture to packaging supply at the cost they were asking. It really is no wonder every thing is sourced from ROC
It was the same with the gearbox. In fact the whole engine and transmission went through a complete redesign/improvement process, which is why it took so long after the first 200 SE models to speed up production. The original design in fairness to both Norton & MCT was a complete no go and was probably not what Stuart expected when he bought the Commando.
As for electronic sensors? I can't really offer much help there. At some point Electrex World in the UK were involved for quite some time. May be they can help. Also Jenvey for the throttle bodies were at one point involved
https://www.electrexworld.co.uk/
https://www.jenvey.co.uk/
The gears and transmission shaft splines in the later models are completely different and are absolutely NOT compatible with Baker items. maybe some of the early models are, but I can't say at which point they changed over. I think the splines may be DIN, but not sure?
The valve gear assembly and rockers received the best and most welcome design improvement in the cylinder head area.
Again from Taiwan. Astonishing improvement over the 1st generation design from the Dreer prototype.
What can't be seen from the outside of the engine is the amount of improvement that the boys in the design team actually made.
It was a huge mountain to climb, but they did some good work. Sourcing and co-design from Taiwan no doubt kept Norton going for as long as they actually did.
One issue you are always going to have is that suppliers changed regular over the years as did the design (for improvement).
Therefore its difficult to know what parts you have in your model and who supplied them, especially with the naughty trick were parts would be swapped out secretly whilst under Service back at base!