I would find every physiotherapist that ever went to school with you or that you otherwise know through friends of friends and linked in/branchout and email the

I would find every physiotherapist that ever went to school with you or that you otherwise know through friends of friends and linked in/branchout and email them about your product. Ask them for feedback, and for as many as are responsive, continue the conversation until they tell you how to sell your product to their company, with their support of course. Good luck!