CCM makes youth skates that are heat moldable, obv they have a variety of models but most of the higher level ones will be heat moldable. I picked up a pair of Tacks for my son a couple of years ago when he still played that they baked in the shop for him, they were closeout from the year before so they were on sale which made it even better (these were a size 12 from what I remember so still youth). A Leif mentioned they do make ankle sleeves which may take up some space, also maybe try some Superfeet insoles which raise the heel slightly which might help (stock insoles are always so thin and flat). Lastly, the old advice from Hans in the Mighty Ducks... wear thicker socks lol