I suggest that you may look up the website:
http://weblab.mpip-mainz.mpg.de/weblab/weblab.html
And find the author's names as : V. Macho, L. Brombacher and H.W.Spiess
I know that Prof. H.W. Spiess has several such second moment calculations carried out in several contexts and ffrom the website you can also get the email address of Volker Macho:
macho@mpip-mainz.mpg.demacho@mpip-mainz.mpg.de
from them by correspondence it may be possible to get the appropriate program for your requiremnt.