Make them or look on Amazon, Craig's list, eBay, Google. Someone has to make them either a company or handmade and sold. My baby's theme is giraffe and as you can imagine it's been he'll finding anything just cause stupid zebra and cheetahs are the popular thing these days. I had my mom make mostly everything (she's a seamstress).
Not to rain on your parade but I think the reason you're having such a hard time finding anything is BC that movie isn't even really for little kids. Way older/adult. If you guys do still want to do it you'll probably have to find somewhere that does custom things (which might be kinda pricey :/) or make them yourself. Good luck though!
I would be very hesitant to use those images in a nursery, too. Babies are attracted to and gravitate toward images in black and white, and many of them are, but they are really distorted/frightening images of human faces.
A lot of small children are terrified of distorted human face images - including smiling clowns.
I'm using the same theme, My aunt is making his quilt. Etsy has a lot of cute stuff
so I suppose none of the other Disney classics are Childrens movies either? Just because it's a little creepy to you doesn't mean it isn't for kids. I grew up on that and it's still my favorite. I make a nightmare xmas tree every year. Anyways you can look in the Disney store they go crazy with the nightmare stuff this season my bf even bought a really soft baby blanket with jacks head all over it in Disneyland. I would love to do an all out nightmare theme but I think he would have a heart attack haha