.. or use someone else's. I believe there's a hobbyist VID under which you can reserve PIDs, or in many cases you can just copy an existing product if your device is generic enough and you're not planning to sell a big production run.
There's pid.codes which uses a vid of a defunct organization, but before that there was also the F055 vid. I still use that vid because no company will accept that vid, since it's commonly used by foss projects.
