Al - Sorry for this late response, but just in case you decide to resurrect your project, I have two 1928 blank backs: #16-Rixey and #36-Rice.
Steve P. - I would love to add your #36-Rice with the narrative back "2 Two Bagger ... Exchange for a Base Ball" to my Sam Rice collection. Any chance you are willing to trade or sell it?
Val -
ekehl333@aol.com