Yes you can make your own. There are web sites that have instructions for Corning your own Brisket for Corned Beef. Most all of them use coriander as one of the herb ingredients. Other herbs are up to your tastes. It can take quite a bit of time to corn the beef or other meat (Turkey, Pork, Chicken) a week? So you must plan on corning ahead to the cooking / serving day.
Didn’t you brine a turkey last year?