Hi
You can indeed replace it but it involves a full housing shop
Here’s a video showing how to do it!
[link|https://youtu.be/ZeT1Zmbt9QE|https://youtu.be/ZeT1Zmbt9QE|new_window=true]
As for the part you can probably find it on eBay or AliExpress
And for tools I recommend iFixit tools as they are top quality and will get your job done very nicely:-)
So maybe pick up one of their tool kits as they will have the bits and pieces you will need! But it’s up to you where you get it from
If you need any advice with doing the repair just ask
Hopefully this helps
Thanks:-)