A quick google will give you other streaming sites that don't make you pay to watch btw, but i thought i'd just link the offical one.
I got the frame from Ikea! I cant remember the exact name though, but just look for one of the bigger black framed ones. It was pretty cheap! 10$ usd or less i think (i bought it like a year ago lol)
As for keeping them in place I used some shelf liner i found lying around the house. Like they come in a roll and you cut them into whatever size you need. I cut a good square, folded it in half so the extra material would push the book against the plastic window, and tightly shut the little back pannel things that hold the rear down. And since it's behind the book, you can't see it and you don't have to worry about tape or any gross stuff sticking to the book! (also protects against dust while showing off the cover, i really like it!!)
So liner kept the smooth book from slipping down, and the extra material pushig it forward kept it in place! the only hard part is arranging them so their even lolololo