I will admit that I don't know them all that well, but I got to know some of them at the 2004 Congress. I believe that Leddy Hammock, the minister there, is a VP of INTA.
You can find her email here: http://www.newthoughtalliance.com/pages/5intabdstaff.htm
I have the following (I won't put the phone and email on this board, but the address above will give them to you.)
Rev. Leddy Hammock
Unity Church of Clearwater
2465 Nursery Rd.
Clearwater, FL 33764
Also, Unity has a database at www.unity.org that will gie you information (address, phone number, service times) on all the churches in the country. (Religious Scinece does the same thing on its websites.)