you can get the pouches on amazon: https://www.amazon.com/Zatarains-Crab-Boil-Six-Bags/dp/B005YQ9IKS
Or you can make your own. Brown mustard seed, coriander seed, cayenne pepper, bay leaves, dill seed, and allspice. You can just toss it in without the bag or put it in cheesecloth.
> Samphire or Sea beans
Sounds yummy... some research later:
There are seeds: https://www.amazon.com/Davids-Garden-Seeds-Saltwort-Pollinated/dp/B0912PTS9D
And foraging possibilities: https://www.daringgourmet.com/wild-foraging-how-to-identify-harvest-and-prepare-sea-beans-sea-asparagus-samphire/
Although I bet my local Asian market has some in the produce aisle. I have the feeling I've seen it before.
Thank you, I learned something today.