There are few informations about this system on the net:
http://www.forecastinternational.com.../or/vo0080.htm
and a discussion on an italian forum
http://pub10.bravenet.com/forum/795583276/show/920704
The first states that 10 FIROS have been supplied to Italian Army from 1984 on, and further 20 FIROS 25.
I tend to not believe this, since no evidence can be found about the former in service, while about the latter the FIROS 30 (not 25) was tested by Italian Army, it seems between 1989 and 1990. It was initially planned to equip three groups with it, then two and shortly after it was abandoned. Number of testing systems are either 2 supplied by the manifacturing company, and 20 (!!) which should be the said two plus a Group of 18. But I never found no evidence of such Group when I was compiling the Italian OoB 1989, though the system was showed to the public on the Republic Day parade in 1989 or 1990. My suspect is that it is company propaganda to "push" the system on the market, and that the news still survives here and there.