Replacing the cord on a DeathAdder Elite?

Hello all!
This is my first time posting on these forums as I am not much of a gamer, but I hope that one of you would be willing to give me advice.
Basically, my older brother gave me his old DeathAdder as he was moving out a few weeks back and got another mouse, I've practically been begging for him to give it to me instead of just keeping it in some box somewhere. This is the only thing I have ever received from him, and as such it does hold meaning to me.
The problem starts with my siblings new puppy. I'm not usually one to be stingy with my things, so my younger siblings would take my mouse when I wasn't using it and I didn't really have an issue with it. What I didn't know, is that they had took my mouse and not been careful with it, someone left it out, and the puppy got ahold of it. If she had chewed it somewhere near the USB i would've wrapped it in electrical tape and called it a day, but she chewed it up near the base of the mouse and I'm quite honestly devastated. I've already checked and the warranty has expired, so I'm not expecting any replacements(whether that be in full or in parts), I just want to know how I can get this mouse working again. If anyone knows where I can get some quality parts to replace what needs it and how to do so I should be able to repair it myself, or if you have any resources for people who repair electronics please let me know.
Thank you for reading through to the end! I'm grateful that you even took the time to listen.
I really just want my mouse back )):