I found a 2009 stats tool (a Perl script) named Euro-Bill-Stats (EBStats) and created by Bernd Arnold / Bernd A. / wopfel (I couldn't find either of these names on EBT, although I remember having seen it before):
http://ebstats.sourceforge.net
I couldn't find a way to download and test it though.
Does anyone know anything else about this?