Doug;
I published a collectors catalog of TITO's in 2004.
See the entry on Greg's book page at:
http://www.chipguide.com/cgi-bin/search/search.cgi?id=books
The sixth book entry down.
If you want to get into collecting TITO's the TITO collectors will be having a trade session at the CC>CC Convention.
Also I have over 200 TITO's available to trade.
Jim Noll R3123