Thanks for some great suggestions above.
Tried a few with mixed results. The Troy Lee seems a good lid and is a decent but not perfect fit. Bonty, Kask, Mavic all no good for my wonky swede.
Specialized looks a good option and an LBS can get a large one in. But the suggestion I really want to try is the Bell Super 2, but I haven’t found one locally – anyone aware of a good stockist in or around any of: Northampton, Milton Keynes, Exeter? Or maybe Swindon or Reading…
I was a bit gobsmacked on ringing up Evans cycles that I had to order it online to “click and collect” just to try it on. I could obviously do this but (perhaps irrationally) it annoyed me – seems like they’re missing the point of why we might go to a shop sometimes rather than buying online!