Ah, I see the source of my confusion. It looks at first as though that vendor is no longer carrying Xantech at all, then turns out that those particular items are not in stock. This is different from "no longer carrying them."

You might just be stuck unless you can call the Xantech sales department and tell them you need them ASAP and can they please figure out a way to look up who they sold some to lately... It also could be that the two week lead time is a figure quoted to your local guys by Xantech, which is double the reason to ask Xantech if they have a clue who might have stock.