@amosdaniel94668 check this guide [guide|78570] Batteries are readily avaialbel for your compur but remember that shipping might be an issue if you are not in the USA. A lot of companies do not ship lithium ion batteries. Of course you can always check places [https://www.ebay.com/itm/201991263321|like this]
Now to rebuild the battery, is a different story. There are no guides for that. Essentially you need to do that like you rebuild any other battery. The problem with these batteries is that you can't easily open the case. Those almost always crack and get deformed to the point of no longer closing or even fitting.
There are some [https://www.youtube.com/watch?v=fN_1FrJO53o|generic YT] videos that show the basics but it will be different for your specific battery,