For starters, that ko must be built for the same exact kernel version as installed on that stick
As goumba stated, it has to be built for that system. A ko file is a driver that is specifically tuned for the host system, either it's built on a similar system and you can try to "paste-n-copy or it is not, and you'll have to build it...
Basically it (as goumba suggested between the lines) involves getting the source code of the driver, unpacking it and building it. And, indeed, a "legit" bundle wil have all the credentials and instructions...and source is at any rate safer to use anyway...
So basically...you'll ahve to learn how to compile/build from source...eh, welcome to Linux, I'd say
Edit : maybe hovering a bit beyond the scope of what's being asked, still, this article
could help too...
More edit : welcome to LQ!