Well, today it's good to hear that supply and prices shouldn't be affected, although I wonder if that only applies to commercial brewers with contracts.
FWIW, if you're pressed for an alternative to Czech Saaz, I highly recommend Ultra. I got some from Freshops this spring and I've been using them in every recipe calling for a noble hop since. They are the closest thing to Saaz I've tried. They smell and taste fantastic, with a touch of that cinnamon note I get from Saaz.