Making a lens out of gelatin

Im wondering if there is some sort of service for creating custom silicone molds to make a lens?
I want to try to make my own gelatin lenses.
I had got the idea from a video where they make an edible retroreflector from agar:
Im curious to know if anyone here has tried to make a gelatin lens before.

I certainly haven't. But if you could find and existing lens you wanted to copy, you could make your own silicon mold using that. Making silicon molds are pretty easy.

@jim10219 How does one create a silicon mold from an existing lens?