the thing is, most times they dont know what they're getting until they get it. I don't believe they get any word from head offices about the new products. So, on shipment days, you open a box and sometimes you get the brand updates. Like, my store just got NARS's spring stuff. Because of Specktra, i knew what to expect, but no one else did. You get the point.
anyway, as long as your Sephora carries UD, they should get it. They most likely won't know what date or how many until they arrive in store. Call, and tell them you are waiting for a new product that is set to be released in early febuary. There is a book taht they put customer requests in, so ask her to record your name, number and the product you want in it. they should call you to tell you they have it, and then canhold it for 2 days.
You can also ask what day there shipments arrive (our store gets them tuesday and thursday mornings) and call back around 6 that day. I say 6 because, agian, they dont know what they have until they take it out of the box, and depending on many things, it can take a while to process a large shipment.