Have you looked through the website sites resources section. Lots of good info. Might not find it immediately but I'm sure you will find it there or it's link. Look forward to you posting when you find one you like. 600 is. Good start.

I did not replace my loom, as it was replaced years earlier. I added wiring for original switches and the map light.

Yes, the wiring is very similar to the 600. I suggest starting with all the basic components (head and tail lights, then ignition, and dash switches). It's rather simple but given the restricted space, I removed the seats and was on my back to gain access.