Where can I buy a Squier? I'm not finding them anywhere.

This far after the Autumn 2010 initial launch of Rock Band 3 and the subsequent Spring 2011 launch of the Fender Squier, most retailers are no longer carrying the instrument, which you may have discovered on your own. Squiers tend to be most readily available in Best Buys, particularly Best Buys that have a music center. You can always call ahead to a store to see if they have any in stock. If they don't, the store may be able to put you in contact with a partner retailer who does. You may also be able to find a Squier through an online retailer who will ship to your area.