I also paid a little less than $5 per quart for 0w-20 toyota synthetic oil a couple months ago.
Here below is the ATT web page. Choose, To Find a business by name:
Type in toyota, press enter. The results shows 25 pages of toyota dealers many with toll free phone numbers. You can also search by city, state or the whole nation. Call any dealer and ask for parts. This also comes in handy when looking for a new car or questions your local dealer can't answer.
http://www.corp.att.com/directory/