Hey man, i may have the solution. As i see the stator is pretty big, but i guess that wouldn't matter that much.
You just need to cut the copper on one size, like cutting all around it in such a way one side would fall as a ring. next, you untie the laces on the other part, and pull the coils one by one with a prybar.
Here an example on a smaller motor, but i also did big with this system.

Hope it helps.