Transformers Armada: Battle for Cybertron is pretty much the exact same game, and even better, it's not impossible to find a copy. These maps will work with Duels.
Also, if you're a fan of print and play you can fund an unofficial expansion here:
http://epicduels.pbworks.com/w/page/60026281/10%20Year%20Ann...
Also, if you're a fan of print and play you can fund an unofficial expansion here:
http://epicduels.pbworks.com/w/page/60026281/10%20Year%20Ann...