What Ignition do I need
 

I have a 2008 gz250. I think it should be simple enough to replace my broken ignition. I tried to get my bent key to turn 1 too many times :/ now the ignition is busted. I just can't find the right one to buy online

I think you are talking about the ignition lock, not the ignition itself which is located underneath the tank.

Is there no way to remove the key stub with a small set of pliers?
Is there not a little nub left?

remove the lack an take it to the lack smith.
My local lack smith will do it for about $20