Gonna be pretty big. That's more likely in the rage of someone around 44-46
I'm assuming then that an L would be just under the appropriate range? Just my luck I can't find a proper size for yet another brand
That kinda depends on your overall build I think. I'm 6'3/175 w/ slightly more broad than not shoulders, ~40 chest. I wear an L in the Fisherman sweaters I've owned. Seems like an XL would be ideal, but an L could work depending.
Is it that you can't find any XL's in stock, or that you think they won't fit? It's the wrong season for seeking right now. In a short bit, you'll have plenty of options.