Back in the mid/early nineties, a company existed that made baseball
caps (and possibly other products). The name of the company was
something like hypnotic or hypnotica. In general they just made
oddball hats with random symbols on them. I'm trying to find a
specific cap, that was navy blue and said "On Air". It was my favorite
hat ever, but by the time I needed a new hat, they no longer had them.
Can't even seem to find the company these days, let alone the hat.
Just want to find a place to buy it.

I'm not a paid researcher, but I have a suggestion for you. Although I
can't point you to a source for that particular cap, you could
special-order it to your specifications at the following site:

www.topstitch.com

I had them make up a special baseball cap for me that displayed all my
Navy ribbons, and they did a wonderful job of it.