In the U.S., many regular ice suppliers sell dry ice. It’s really no big deal to handle it if you use simple precautions. As I mentioned above, it’s commonly used for shipping stuff. Liquid nitrogen, on the other hand, is hard to handle and probably is harder to find. There are some cool (sorry) liquid nitrogen videos on Youtube.
A little googling uncovered this dry ice provider in Israel: S.K.I. Marketing and Distributors Agencies Ltd. – Kiryat Ata. Their domain name has dryice in it.