I don't know if this person still tables there but I think it may be worth checking out, I also know some folks in artist circles so I will ask around.

Hey! Sorry for the comment on a random post but I came across a video talking about the art/children's book you were looking for. I'm from ATX and I swear I remember seeing something similar at flatstock a few years back, probably pre-COVID. Maybe it's the same person? (Cont bc character limit)