Wands specifically can't be duplicated or made by anybody but a wand-maker, I'm pretty sure. But what always baffled me was there was the whole emphasis on the wand choosing the wizard (and Harry making things break when trying to use wands that didn't fit him), and then Ron has this random hand-me-down wand...? Why go through all that trouble of talking about wands needing to fit the wizard if you were just going to give wands to people willy-nilly? (And whose wand was it originally? o_O)