You should be able to call your hotel and ask, they will tell you if they sell them, the price and for how many days. We needed a 5 day hopper but my hotel was selling up to 4 days hoppers, so I ended up buying them online. You can buy them online at the Disney website for a discount price and pick them up at the "Will Call" window at the entrance of the park. It is Window number 4 I believe but if you ask any of the CMs they will be able to tell you.
Hope this helps!