Remember, Honda has published size limits for the valve stems and the bores of the guides. If you measure the stem of the exhaust valve, and measure how much it moves in the guide, you can calculate the size of the valve guide bore, as explained in this thread:
https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=23913&page=1

Is the three piece oil ring you looked at a steel rail ring set? This type of composite ring has two steel rail rings, which are flat thin steel rolled on edge to make piston rings about one mm thick, and they are installed with a ring expander also made from thin flat steel. The expander both holds the rings edge-on to the bore, and applies outward pressure to them. Just about all car engines except British ones have had steel rail oil rings since WW2, but most British cars didn't use them until about the 1960s. They are far more effective than cast iron oil rings in controlling oil consumption, but they are more expensive to make, and I don't know how they would perform in aluminium bores. If Honda sells them as "genuine" replacements, I think you would be safe in using them.

Have you checked the bore size, underneath the ridge at the top of the stroke? With the rings so worn, there is a good chance the cylinder will need a rebore. Putting new rings in heavily tapered cylinders is seldom successful.