Where can I find Plaster in Fernwald?

Plaster can also be found in these cities:

Bad Nauheim Butzbach Giessen Langgöns Lich Lollar Mücke Münzenberg Nidda Pohlheim Reiskirchen Rockenberg Wettenberg Wetzlar

You can also find this in Fernwald:

Stomach Tea Building Materials Melissa Spirit Glass Cleaner Shoe Care Household Goods Light Soy Sauce Cane Sugar Cumin Gift Baskets