I live on the east coast and I can honestly say I've never seen a bottle of Nizoral on store shelves here. Maybe I'm looking in the wrong places. I know the feeling of looking for rare products, though -- it's like hunting down Bigfoot lol.
You could always buy nizoral online. It's apparently not as cheap as it is in stores, but at least you can order some to use until your stores restock them. Keep in mind that there are other shampoos with keto in them as well, so you could keep an eye out for those. I've been trying Regenepure...it's relatively expensive and it still doesn't get rid of my scalp itch, but I guess my hair feels nice after washing it. If I could find a good price for Nizoral in a store located in or around NYC, I might switch back to it.