Dean is correct, that you would have had a better chances requesting at 13 months out. Right now, the weeks are in the "home" resort preference period. At 8 months, left over weeks will be made available to non-home resort owners. So if a match happens, more then likely it will occur less then 7 months out.
You can go to Tug, redweek.com, vrbo, craigslist, myresortnetwork and many others. Personally, I like redweek, tug and craigslist.
Also, if you put in for the Westin, make sure you select both of the resorts. They are right next to each other.