I don't know if they sell it but it's available for free on many lab computers:
UVa Labs with ITC-Supported Software
ITC sells a lot of software. And don't forget about the $10 Word 2007 with student ID at the bookstore.
I don't think they'd run out, and they would order more for you if they had. But move in day isn't until tomorrow! So it's highly unlikely your books are gone already. I've had classes where I waited to buy the book and it sold out, but the bookstore ordered more and the professor knew only half of us had books so it didn't matter.