Parisien,
Very happy to do so. However it may be another nine months before the old set need to be changed. As you posted, the Maserati part number in the Eurospares link above is 980139070 and this was the part number on my Dealer service invoice when the front pads were changed. However the Brembo boxed part which has now arrived has labelling reading Brembo Brake Systems spare part code: 107.9209.42, Friction Mat: Jurid 673, Pad code: 07.9209.45 and is labelled GTS/Front MASERATI M139/Front and has no reference to Maserati part 980139070. Does this help?
Googling these numbers produces nothing brake pad related as far as I can see, but hey you learn something new every day as 107 9209 42 throws up first on Google the grid reference N42.9209° W107 - somewhere called Love Ranch, Wyoming. Which is nice if you enjoyed Broke Back Mountain but admittedly not much use if you are interested in Maserati spares.