>>11612816
>do you know where they're from?
Hobby consignment shops like 33 mitomi, but you'd have to go to it in person.

Try checking booth or anywhere really for 5mm doll eyes,ドールアイ5mm. As for switching them out, you just use something soft like a cotton swab to push the eye out from the front of the faceplate, and then just pop in a new one. They should be the same size as your original ones, so it wont hurt the plastic.