[well, they should almost certainly have those in stock! Unless there's a sudden rush of demand for them. Who knows?]

Ah! I see. [she's somewhat more obvious about her observation of his hair, but surely that's understandable! It is very impressive hair.] Which one was that? I could see when we're likely to have it in stock again. Or perhaps I could see if we have something with similar ingredients right now. [it could be worth trying!]