I suggest you go to http://www.genforum.com
and visit the Rice forum. You will find more people on that site working on the VA and East TN Rice lines, and some on Tandy, too. Be prepared to get caught up in the swirl over all the Isaac Rices in VA and East TN, I don't know how anyone will straighten them all out. Some will be working on the Tandy Rice son of Isaac Rice, but he is too late for your Tandy.
Type in Tandy in the "search this forum" box, and you will see lots of queries and responses. Or, type in 7415 in the box on the right side marked "jump to #" it will take you to a query and some responses that may help with your question. Or, you can post your own query and see what responses you receive.
Or, you can go to http://www.familysearch.org
-- do a search for Tandy Rice, born in U.S., and #13 under Ancestral File shows marriage for Tandy. Click on pedigree and you will see submitter shows Ann Tandy married Wm Holman. And, of course, Tandy's mother was a Holman, so the name comes down through her Holman line. Click on sumbitter and I would contact that submitter and see what source he gives for his Tandy information. He certainly shows the Tandy surname going back in time, so he must have something.
Happy Hunting (^_^)