Was finally able to cobble together a set of these, first by placing an order for some from the app a week ago, they said they had plenty in stock, so I ordered 6, they cut my order down to 4 and I lucked out and the order included Boba Fett, Yoda, Hoth Han & Bespin Luke. Then this morning, I hit that same WalMart that the app indicated had stock and I found Leia and Lando (along with another Bespin Luke, Hoth Han, another Hoth Leia and two more Landos) scattered around the toy section.
I've had to use books to attempt to flatten the curvature of all of the cardbacks on these - apparently the endcap display shipper is to be blamed for the curvature of the carbacks, but I don't buy it as this store had no sign of the actual endcap shipper - just the items, so unless they purposely ditched the endcap display, they came out of the shipping boxes with slightly curled/curved cardbacks.