I’m not sure what the availability is for the O200 and O235, but it’s not good for my O470 at the present time. I have a cylinder with a crack in the exhaust port, so I was going to replace it with a new one from Superior, but their are none to be had. I have found a couple places that think they are next to get a shipment, we will see. If all else fails, I can get a new OEM for $450 more, or after the first of the year get an overhauled NIC3 for almost the same price as the Superior.
If somebody needs O235 cylinders, I have 2 that are rebuilt and ready to go and a third cylinder that only had about 300 hours since new that needs freshened up.