Nexus 7 2013 Replacement Frame/Backplate

TLDR: Where can I find a replacment front frame and backplate for my Nexus 7 2013 2nd Gen?

So I left my tablet in view of my dog while I was at work and he's been pretty jealous that I'm the only one that gets to play with it so he tried to sneak some time with. Obviously destroyed the screen and I feel confident in replacing it, but I'm having a hard time finding a replacement frame or backplate. I don't need to replace these parts as they are just cosmetic damage and I can get a case but I'd like to if I could find them.