If anyone is looking for a styling head for an older child, this is the cheapest I can find I believe its £15 posted in sterling (or €20). I've ordered one for my daughter:
DESOMI Soft 100% Synthetic Hair Hairdressing Head 26-28 Inches, Professional Soft Training Heads, Doll Head for Practising Hairstyles with Holder + DIY Hair Hairstyles Set (Ombre) amzn.eu/d/c58XDgh