If you don't care about the exact variety, and want "random colors", there are a lot of traded zinnia seeds floating around that were "cross-pollinated by the regiment".
Let's say they have LOTS of genetic variability.
How tight are the regulations about mailing flower seeds INTO Israel? I always assume that "Israel is a desert", and that "nothing is invasive in a desert". If you'd like to try, I have plenty of "No ID" or poorly identified Zinnia seeds from trading.
But maybe lots of things are invasive in well-irrigated deserts!
