Can you give me an example of what kind of driver you're looking for?
A few years back l used to have to search for a while to find a website that just so happened to have the driver l was after.
Since then support from manufacturers websites have become a lot easier to use, and like you say, the rest seem to be driver update software for around £25.
But the experienced l gained from searching for hours back in the day has given me a good idea of how to find those old pages that's usually someones' personal site who had the same problem with finding drivers....so maybe I can help still?