low-cost Powerblocks alternatives??

I can't afford Powerblocks and I searched another post and someone mentioned they had these at Walmart,
http://www.designbig.com/webfolio/sm...s/dumbells.htm
However, I've been to 2 Walmarts and had a friend check another...couldn't find them. Anybody see these or have any other suggestions?
Thanks.

I think you may have seen my post.

They definitely have them still at the 7 & 400 Wal-Mart.

$40 for each 25lb one.

thanks...I ended up finding them myself at my nearby walmart. they weren't in the weights section but were hidden under the all the home gym boxes.
anyway, $40 each for 20 lbs...that's the only size I saw so I didn't get them. I want the 30 lbs. at least.