I don't know a source but I'm not sure this is a good idea for privacy for a bathroom door.

You can buy door decal

I have oixelated glass doors to my bathrooms and bedrooms down a long hall and you see nothing except maybea shadow that tells you something is moving if some one is very close to the door. As for what you are looking for find a glass artist but you will need to have an actual door since barn doors are not good for bathrooms.

Wow yes.. this is the kind of door art I was looking for!

I m going to send them a msg to get a custom quote