help finding a bald head shell for ob22??

i'm so confused as to why this seems so impossible. i was introduced to obitsu dolls bc someone suggested i used them for a doll custom. i'm making dipper and mabel from gravity falls, and needed dolls that actually looked like children, so i got ob11 as suggested. i have used aliexpress, as that seems to be a pretty good place for bjds!

i decided i also wanted to make young adult/teen versions of them, bc i can, and i found ob22 bodies i really like. for some reason, i cannot for the life of me find a bald head shell for an obitsu this size! i've found faces that will match the child versions of them, but all i can find are hair head shells. i plan to either make wigs or glue wefts to the head for both versions. i very easily found a whole bald head for ob11. why the fuck can't i find even ONE for an ob22 or like a ob24?

maybe i'm just using the wrong search terms? i've tried stuff like "bald head (shell)", "plain head (shell)", "blank head (shell), and am only getting faces. these searches were based on the terms in the ob11 head title. i've even tried googling those terms, and still have nothing. can anyone either point me somewhere or send me a link to one? i've been searching over a period of about a week atp, and i feel like i'm loosing it