Replace My Dentures

I hate putting this up, but I could use some help. As you can see, my Miniature Australian Shepard, Millie, somehow got them off my desk and kind of chewed and broke them. So, they need to be replaced. 

The other part is that I need to get my lower teeth extracted and get a new lower denture. 

I would really appreciate any help that's possible. 

Thank you so much.