Many excellent practitioners, who provide truly custom-made devices, charge the same as those who sell non-custom inserts with no particular expertise. In Ontario, the average cost for custom-made orthoses is $450 to $500.When you do decide on a clinic, you should receive a proper examination to determine if there is a strong relationship between your foot mechanical issue and the symptoms you are experiencing.any excellent practitioners, who provide truly custom-made devices, charge the same as those who sell non-custom inserts with no particular expertise. In Ontario, the average cost for custom-made orthoses is $450 to $500.