Hasbro toycompany has Duke Ambush still. I find one here and there at Marshall and kmart.

POC has what I think isn't really a true troop build capability because there is alot of individuality. What I found is that they are good for small teams.

Jungle Duke: With some arm and head swaps can make a good 5 to 10 man team like did with The Bushmen.
Beach head: A small commando unit like I did with the Rhino. Change mask colors

Dusty: small 4 to 6 man team switching heads or 2 man sniper scouts. Even though there are two heads, a large team would look funny.

Shock Troopers. I think can be endless. I think a great compliment to the ROC H2 with the running boards on each side, 4 guys hanging off ready to attack.

Alley Vipers: same thing