It's very easy to find them on the web of course. Many sources....but in stores, probably not.
there are other ways to utilize the kettlebell principles with other types of equipment, which is what i do.
Kettlebells are ridiculously expensive!!!!!!....and cost prohibitive for almost everybody unless you are a large gym. Most people can only afford one or two single kettlebells of differing weight to save money. I think it's like about two cents a pound, or around that. Pretty expensive if you want to buy a single 40lber.