Is Prepaid nano SIM Available for sale in Finland

Taking an unlocked iPhone 5 to Finland. Would like to purchase a prepaid nano SIM card to use for 2 months. Have been told none of the mobile carriers (Sonera, DNA, Elisa) sell prepaid nano SIMs. If that is true can I use a SIM card die cutter to cut down a Micro SIM card to the Nano SIM size? Will doing so affect the performance of the card?