Custom would be expensive for someone growing, and they would soon grow out of them as they are tighter than regular skates.
Nearly two years ago I was sold Bauer Bapor x500 skates in size 8EE. I kept having very painful falls when one or both feet would shoot forwards. I was always moving slowly at the time. On one occasion I left blood on the ice from a head wound. Anyway, I eventually went to be refitted at a better shop, and came away with Bauer Supreme s160 skates in 7EE which fitted perfectly. I never once fell in the same way in almost two years, sure I fell lots but only when trying new moves. I still don’t know why I fell in the bigger skates, but maybe the balance point was out.
In my experience having good blades is critical, they have to be sharpened correctly and have the correct profile, my last runners were nearly flat, a fact I only discovered after buying new skates. Many if not most sharpeners are not experts to put it politely.