The Z1 Kaw is another bike on my list I would like to own Stev-o. But these are far a few between and the ones you run across that are in fair to decent shape and need a little work are generally high $$. You were at the right place and time on yours Steve. Do you even want to ride the 750's after riding the Z.
They are out there, DHall, you just need to search. This one came from S. Carolina, I found it on one of my daily searches [like we all do, right?!]. It wasnt cheap, but the engine was mechanically sound and just needed tires, brakes, oil, etc and some TLC. Next is stock paint scheme for the '75.
I'd like for you to ride it, it may give you thoughts of selling your HD....ha!
I still do like riding my 750's as well as my CB550, Yammie RD350 and even my little Suzi TS250, it's fun to ride different bikes!