I'm not sure if this would be of interest for turning tools since it is marketed more toward hand chisels and plane irons, but for the CBN wheel lovers in the room, Tools For Working Wood sells a few sizes of very slightly crowned CBN wheels. The link tells the story and purpose. I checked the forum archive, no mention of them, so I thought I'd post them for anyone that may feel the need. No experience with them myself, found it while looking for something else.
https://toolsforworkingwood.com/store/item/MS-CBN.XX
https://toolsforworkingwood.com/store/item/MS-CBN.XX