Looking at Walmart's selection, this pack might be okay, although the photo doesn't match the page's description:
$6.97 for 3-pack
http://www.walmart.ca/en/ip/star-wars-t ... 0194983310
(out of stock online)
http://www.walmart.ca/en/ip/star-wars-a ... 0194983329
This is the one you want!
http://www.walmart.ca/en/ip/star-wars-r ... 0195359671
Arggh, so tempting, even though I've already spent enough $$$ on stuff this month.