Don't forget some people make their own fonts, and never sell them or put them up on the market. It's getting easier and easier to do. Heck, I made my own font a few years ago with no experience in typography at all. Took me a LONG time, and it pretty well turned out crappy, but I DID make one to use in my computer. There's a chance your font was part of someone's personal collection.
The answer? Take it to the vector doctor.