I think only Wave 1 (Ani/Durge, Asajj/Skorr, Ani/Droid) and Wave 2 (Cade/Talon, Legacy Guards, Fenn/Dengar, Leia/Tobbi) have hit retail...
The only people I have seen report finding Wave 3 (SotE Leia/Xizor, Thrawn/Karrde, Vader/Trachta, White Vader/Endor Leia) have gotten them from an e-tailer/on-line source and not at regular retail stores.