Just curious…
Why do you want one?
I’ve been forced to use them in the past & as a first point of contention, they are an expensive piece of plastic. Secondly, durring a rush, they are very inconvienent to use. The cheese clumps in the contraption, forcing you to take time out to clean and unclog it once in while. In the middle of a hectic rush, many pizza makers do not do this, and the cheese comes all out in one heap in the middle. Thirdly, it does not necessarily do a great of a job as a measurement tool for cheese. Most of the time, you end up being either way over on usage or way under–I guess in the long run, it evens out, but leaves for an inconsistent pie.
Really, I’m not trying to dissuade you. This has just been my experience, and wondered if perhaps you’ve had better luck than I.