Have you asked at an FT500 forum?
Here is one I found with a quick google search:
http://autos.groups.yahoo.com/group/honda-ascot/
1981 CB750K with 900 cams
90K KM's, rebuilt head, rebuilt carbs, upgraded valve stem seals
My wife's recipe website that I'm trying to help promote:
Strawberries for supper. Yes, I am a lucky man.