Has she actually sold to stores based on the fact she is representing herself as you? I would also call that theft of business income if she has. Maybe you could also collect info from store owners or whoever she has represented herself as you, brochures, letters, etc. Maybe you could call a lawyer, some offer free consultations, or even if it costs you $100.00 and they could send advise you. Maybe they could even send her a letter and that might deter her.