forgot to mention: Univ of Minnesota first available appointments are in Feb (a.m.)/ March (p.m.).
University of Minnesota has a Sjogren's Clinic, you can google it for the information. I also have Sjogren's and live in Iowa City, work right across the street from UI Hospital, but am going to make the drive to Univ. of Minnesota because of the specialization.
Boy, isn't that the truth! Wish I could help you, but I don't live anywhere near Iowa. The only other thing I can think of is to check sjogrensworld.org. I didn't see any listings on their site, but they have a "buddy program" and they might be able to hook you up with someone close to you that has an informed doctor. Good luck!