Just picked up Mark II and Deep Dive Armor from my walmart.
I did not pick them up in the toys aisle. I picked them up in apparel. They have a display set up over there, have shirts and shorts of Iron Man 2, an Ac/Dc display of cds, and then a big toys display. There was one little section of the 2.6 figures. I found those two there among others. So there is another place to look. I'm sure most of the walmarts will have similar set-ups.