I don't have a good way to transfer the information onto cards, but I built something into my Excel DM program that imports monsters from Adventure Tools and stuffs them into a comment box. Basically it makes it so that you can hover your mouse over a monster in the initiative program and it'll show you the monster's full stats.
You might be able to figure out a way to hammer that into a format that makes you happy, but there are a lot of monsters, at every level of play, that are going to feel really really crowded on a 2.5 x 3.5 inch card.