I haven't looked but I wonder if the sites for Cleveland Clinic and Mayo Clinic have the name of the head of the Hematology dept [or hematology/oncology] - could write him/her to see if they have a suggestion on who to see.
I have had a few hematologists since the start of ITP, including one in Tokyo & one in Hong Kong - one here was so so so fantastic but unfortunately he passed away suddenly, his wife wrote each of his patients a personal letter letting us know how much each of us meant to him. Now I have a hematologist who absolutely LOVES blood (he is also an oncologist because he said you can't just be a hematologist, you need oncology too) - my first visit with him he had a flip chart made up about ITP and also gave me a hand out he'd written about it, he knows a lot about ITP and with that flip chart and handout he had me forever a patient. After all by the time I became his patient I'd had ITP for over 20 years. He is a super hematologist, I pray I never need him as an oncologist!
I do hope you find someone to help you at either of the clinics - seriously, you might write (or email if you can get an email address) the head of the hematology department for advice as who to see. Or call and get the hematology department.