Question How can I modify the animation system unity currently has?

Hello, I was wondering if there was any way to modify the current animation system, hopefully using code I could read up on somewhere, at least to some degree (coding is not my strong point) so that it would differentiate between multiple colliders on one gameobject and allow me to animate their parameters (shape, size, etc.) individually. Unity's current animator does not differentiate separate instances of the same component on one gameobject, so once you animate one instance you are unable to animate any others. I am aware of people who've been able to completely rebuild the animation system to suit exactly the purposes I have (2d fighting game with a high amount of separate colliders that need to change based on the frame of animation), however most of them are paid (and the prices are pretty high to me due to my country's money's low value) and the ones that aren't (one of which I found on these forums, in fact) no longer work or the links to them are since dead. Any help?