You don't say why you need them. Orthotists need a prescription, which they can't do this without a diagnosis which would generally come from an orthopedic surgeon or a podiatrist. If you have a diagnosis already and that's how you got your current shoes, if they are working out well I'd try to contact whoever I got them from and get another pair that conforms to your prescription. If you just bought them off the shelf from a store that sells shoes to people with foot problems, what you get from an orthotist will be a lot different. If they are custom made by a shoemaker, go back to that since it's working for you. Peace.