I picked up a 82 CB750 Custom for a easy project bike last year. It sits very low, I can flat-foot the thing and I am not tall or long legged at all.
I took it out of ride a day or two ago after doing the required tweaks it needed and found it too low for my liking. Reaching the ground is great, but the pulled back bars and high pegs makes me feel too cramped. I'd imagine that a shorter rider would absolutely love this. Find something like that, or a KZ Limited (various displacements) in your area and see if she likes it.
I'm still going to keep my CB1100 of course, and will be marketing the Custom locally, it's just not for me. Comparing the two bikes, REALLY glad I've got the CB1100 in my "stable", still a great bike (and I like fins).