Where can I find a new home button and/or cable?

So my friend and I are working on fixing this iPod touch 7 that we ordered on eBay. The screen is obviously smashed and it’s missing a home button but it seems like the home button part has been exactly the same for a few generations on the iPod’s now. Can I use a 5th gen home button to repair a 7th gen one? and can anyone tell if the ribbon cable for the button is still there? Thanks! Also the seller said the camera was missing but as far as I can see it’s still in there. I attached some pictures of it but this is my first post so I’m not sure if I did it right…

Edit: here’s a link

https://imgur.com/a/tEXQENq