I bought custom footbeds from Cloin at Solutions4feet. He used to race mtb in the 90’s and is a nice guy .
He recomended me some Atomics for my flexability and foot shape. He had them at £250 , and the footbeds would have been £60, or find the boot yourself and pay £100 . I found a bnib pair on ebay for £80.I have done probably 20 weeks in them and they are lush.
Got a crack in one now so looking for the same.
Tricky to know what to recomend really . But I do know this . Poor fitting boots will ruin your holiday . They should not hurt, the buckles should close with the force of a little finger push , and you do them up from the top down