I've only looked in my area walmart so far. They have lots of trading cards near the register, but mostly topps sports cards. No clone wars retail yet. I hope to try a few stores a bit farther out this weekend.
It's always frustrating when others are finding things and I'm still looking! But eventually, things mostly tend to turn up.
My Walmart didn't have the build-a-droids either, but did have a few Clone Wars toys.
I happened to walk into a Gaming Store while visiting in Phoenix, AZ and they had Ladies and Quotes. They also had the 30th Collectible playing cards in the flip-open case with Certificate of Authenticity. Of course I got them all! I then walked into a K-B Toy store in the same mall and found the Vehicles Heroes/Villians 2-pack. I just visited the Cartamundi website, seems they have a Clone Wars 2-pack coming out. Gonna have to find those.
Someone mentioned their base shipping is a bit on the high side but I suppose if you were ordering multiple items it'd be worth it. Just did a quick check on Ebay and found either deck going around $6 each. Amazon has each deck for $2.99