What happened to the ones the dealer gave you with the car, supposedly they are standard now. I know they used to be an add on but they should have given them to you when you bought the car. If not I would buy the OEM mats, they seem to hold up better than the after market mats.
I love walmart as well. The walmart isnt that close to me and is in another city so I dont go there very often unless I really need something. You cant just go in there to just see what they have. I tried that when I went there to buy these mats. Thats the only thing I came for $29.99 than I'm out. Next thing I know I have a shopping cart and I'm finding food and picture frames and a blue light for in my car as well. I ended up paying for about $80 of stuff. The automotive dept is pretty big at this one as well and probably has just as much as the Local Canadian Tire or more.
Mine came with the carpet ones, but we put the mopar slush mats in place of them. They are deep rubber and say caliber on them while being a perfect fit. I think they were around 70.00 for the set of 4 matched to the color.