Toys R Us has listed another polybag that you may be able to find in stores very soon, the LEGO City Arctic Scout polybag.
It is listed on the website as sold in stores but you may want to call and check to see if they have them on the racks. This LEGO polybag goes for $4.99 each and it has 39 pieces and includes an exclusive minifigure.
LEGO City Arctic Scout Polybag 30310
39 pieces | Includes Arctic Scout minifigure | $4.99
(Hat tip: The Brick Fan)