Need some help with extracting models from the game

[Fishyboy028]

Hello, right now I'm looking for some ways of exporting models from entities out of a .class file in order to import them into blockbench.
I know if by chance someone reads this, they might suggest the entity wizard, and that is a perfectly viable option yes but I decided that if i were to ever lose the original files of the mod I'm making that I'd at least go through the trouble of learning an alternative way of getting them back from another medium.
So yeah if anybody knows how to extract the model from say, something like the ender dragon model out of the .class file please help me out!

Thanks!