yeah it seems I only ever see sz 41-44 these days; just lucky for me that I fall in that range I guesslayer-0 might be easier to find, just because using an insole + sizing up works easily and comfortably (if you want to keep that upturned toe shape you have to anyway), that's what I did- about 1 full size up (43 --> 44).
I have nothing but good things to say about the layer-0 derbies I have. Thick sturdy leather and a rounded upturned toe is pretty much ideal for derbies in my opinion. MA+ super good too but I'd say they are on the more formal end while the L0s are a bit more casual/hardwearing in style.edit: i'll throw in a picture of mine:
pretty sure this one is gonna finally stop me from endless close calls for being late to work. so many features to stop you from being lazy. 30 min before the alarm goes off, you can't change the time, so you can't wake up and turn it off to get more sleep. if you try and unplug it, there's a 6 hour internal battery. also, it looks nice