I have neither seen, not looked for, such a thing. It could exist, but I doubt that anyone has made such a thing.
If you've unpacked the game resources, you can go right in to them, and open the XML files to see them.
However, I would suggest that you merely pick the units that fit the theme of your levels, and then go in to the xml files and change them so that they are balanced. It's extremely easy to change the movespeed, health, and attack damage of actors, so that should be enough to rebalance them to fit whatever you need.