Here`s a source for regulator rectifier , harness parts and tips, diagrams

[zman]

I have used several of this guys regulators with excellent performance, hand made in his garage and built twice as tough as stock,
https://oregonmotorcycleparts.com/

 

[Steve83]

Good info - thanks! I just might need to use him...

 

[dan filipi]

He's got some good electrical and wiring tips buried in there too.

 

[joedrum]

yep good read