The lady cosplaying Pinoko is called Hitomi Goto (chibita_115)! Since she cosplayed Pinoko and seems to be interested in the character, I think she'd be a great fit. She works in the fashion industry so I'm unsure if she'd want to do acting, but wouldn't it be awesome if Tezuka Productions reached out to her? If she's not interested in acting, maybe they could do an in-character promotional fashion shoot together. If I worked in the industry, I would immediately reach out because I think it would be an amazing opportunity to get the chance to work with her. Of course, I'm nobody, and I'm just daydreaming at this point.

Unfortunately I don't know anyone else. I don't really keep track of celebrities, and sadly there don't seem to be a lot of Japanese actresses in the public eye who share the condition. If you have any suggestions of your own, please do share them!