Year ago, I made a tops turvy doll like that. I did not have a patternfor it. I just took two of the same doll patterns (I traced them off one doll pattern) and cut the body piece in half and joined the two upper pieces. For the dress, I made two dress tops, and two skirts and instead of hemming the skirts, I pressed to hems over 1/2”, and sewed them to each other. Instead of snaps or buttons, I hand stitched then closed so they did not come off. My DD drug that thing everywhere. Hers was a “dog” on one end and a “cat” on the other.