You don't have to be a member of brickseek. Just type your zipcode in the box and click "search inventory". It will pull up all the Walmarts within about 60-70 miles of you.
If it shows 0 on hand, limited stock, that means the store's system shows one on hand.
If it shows 0 on hand, out of stock that means the store's system shows zero on hand.
If there are 2 or more on hand it will show actually stock.
Keep in mind that stuff gets stolen from Walmart a lot, so while brickseek shows EXACTLY what the store's system says it has, that doesn't mean it will always be there.
Still, if you have a store close-by that shows one, would be worth a look.