Where can I find Plaster in Alpen?

Plaster can also be found in these cities:

Dinslaken Duisburg Geldern Hamminkeln Kamp-Lintfort Kevelaer Moers Neukirchen-Vluyn Oberhausen Rheinberg Straelen Voerde (Niederrhein) Wesel Xanten

You can also find this in Alpen:

Semolina Porridge Cake Vanilla Sugar Jelly Ice Cream Desserts Meat Products Lemonades Instant Coffee Pumpkin Seed Roll