Where could I buy custom shoes/boots for foot and walking problems

Not sure if this is the right place for this. Apologies if it isn't.

I am a 23yo female and am autistic. I have some walking problems due to autism which I do some physical therapy exercises for. I naturally walk on the outside of my feet with my toes curled in. I also have flat feet. While my exercises have been helping, I would like to take my health a step further with some better shoes. Does such a place exist where I could get custom shoes (preferrable something like combat boots) with inserts that would help my feet? My friend pointed out that I already have an itty bitty bunion forming from walking on the side of my feet for my whole life and I want to stop it before it gets worse.