You may also find some other NetBSD packages that deal with scanners. You can contribute new packages to the NetBSD package system. You can donate money to The NetBSD Foundation. You can help people be aware of NetBSD as an option, and help other users deal with problems that you know how to solve. You can contribute to some of the documentation efforts that are ongoing.
Few people can do all of the above.
But most people can do at least some of the above. Some require programming ability. Some require money. Some require patience. Some require more subtle things, such as the right kind of hardware.