I'm trying to make a data pack to add a new breed to the game and I have been trying to find some kind of model so that I can use Blockbench to retexture the dragons and I can't seem to find it; so my question is where can I find the models for the dragons so that I can use block bench to retexture

Ah, I see that's unfortunate then. thanks for the help I will just do it by editing the png then

Sadly for what you're trying to do, I'm pretty sure the dragon model is created programmatically instead of as an asset you could grab. What you could try is taking one of the textures and using that as a base in an illustration program or pixel editor.

The textures in the example are probably a good one to pull: https://github.com/Kay9Unit/Dragon-Mounts-Legacy/tree/master/example_addon/assets/example_addon/textures/entity/dragon/example_breed