Onyx, save your knee and don't try to find that power station at Wal-Mart. I just checked their web site as well as those for Lowes, HomeDepot, BestBuy,Sears, and RadioShack. Looks like you'll have to wait until Tues. for yours.........BUT, hey, your knee won't hurt looking fruitlessly for one at Wal-Mart! (I'm trying hard to be optimistic today.)
I am overwhelmed by your kindness! Thank you! Tuesday it is. :)