Lancer Militaria (PO Box 886, Mt. Ida, Arkansas 71957 USA Tel. 501 867-2232), who mainly deal in military books, also carry a number of tapes and CDs, all military music of one sort or another. I believe that as of the last music catalog I saw from them they had a number of tapes of US military cadence calls - can't find the catalog at the moment, but I'm sure they would be happy to send you one if you were to call.I highly recommend the set of Bobby Horton Civil War songs that they sell, BTW.
Eric Berge edberge@ibm.net