Might as well throw some info out your way if you're in this neck of the woods.
The Lakes mall in Muskegon has a KBs Toys that has a slew of Crimson Sabotage sets. Picked one up for myself & my brother.
The Wal Mart in Grand Rapids off of 28th St has wave 5 in. Picked up the PP Viper & Tele Viper packs. I'll be going back for the BATS & Cobra Ninja packs later.
Most of the Family Dollars have the Alpha vehicles in but no more single packs.