Hello, I'm sorry you had issues finding PAs to shadow. For recommendation letters I did have a physician assistant write me one. If there isn't a specific requirement from Stony Brook about having a physician assistant write you a letter of recommendation then I would still apply. You just never know what these schools are looking for. Every school I have noticed has specific things they are looking for. If you fit their description to be a potential student, then that is all that matters. Goodluck to you?.