Stupid question, but why don't you buy them? If you had money for the Brera then I would assume that you have that extra 150-250Euro for the maps (depending what map package you need).
By the way you can order maps from here: NAVTEQ Maps ? Buy the latest map for your GPS SatNav
I've heard that the 2010 packages maps are coming out soon around spring.
Would you please be kind enough to send me a link to the NIT G1 Switzerland version map? It would be perfectly fine if the CD contains more than just Switzerland. Thank you very much and I am looking forward to hearing from you!