The new jet powered Shaheds are more expensive as well. And Ukraine is already having good success in shooting them down without patriots (which they are very lacking in) - these are new drones that they just designed for the task. These new interceptors are more expensive than the old ones, but still cheaper than patriots by a lot.

We know Ukraine is working on a not a patriot interceptor that can do ballistic missiles, but so far there is no word on progress. (this seems to be intentional - they are not saying why but experts have some good guesses)