Readikus, they come with Specialized insoles when you buy them separate. Try asking at some shops, they should either give them to you or not charge much, must cost pence to make.
The arch support should really just maintain the natural shape of your arch, so for flat feet red is suitable.
The varus/valgus tilt varies between brands. Giro has none, you create it with insoles and shims. Specialized have a slight varus, because most people are naturally like that. It sounds like you’re not (you’re valgus), so you need to correct that.
Only thing I’m doubting is the fact that I’m pretty sure the tilt of the specialized shoes won’t have changed much in two years, they’ve been pretty consistent with their last shapes for a while.