The Reunion site does not moderate the message board and, so far as I know, does not reply to posts. There are a few of us who watch the board and try to help out. If you go to the main page you should find a link to the Board of Directors. You may be able to buy a copy of the poster from them.
The big Lilly Tree poster that is for sale has not been updated since about 1979 when it was first created.
If you are willing to trade information with me I will create a chart of your Lilly ancestors as I have them in my files. I am a 6x Lilly descendant and have been researching the many Lilly lines for 15+ years.
Was your great grandfather Thomas Jefferson Lilly?
