So I've been working for a couple of days and have managed to reproduce a couple of Nozzles! Here are the casts that I pulled!

As you can see, one of them had a few bubbles in it.

Here's the molding and casting setup that I'm running.

A close up:

I'm considering making more, but for now, they can only be (EDIT: Painted) cosmetic replacements until I order some black plastic.