Hi again Rubén,
After this summer we will re-publish the sample library on the Nord website in 2.0 format. When that is done you will be able to download these, and other new sounds. Another little tip: If you download the factory restore file for the Nord Stage 2 EX, and change the file name to .zip, you will be able to access the .nsmp files used on the NS2EX. Some of them are the same as on the NS2, some are new, and some are simply updated in various ways.
Product Specialist, Nord Keyboards / Clavia DMI