Where can I find Particle in Lauerz?

Particle can also be found in these cities:

Altdorf Baar Buchrain Buochs Cham Ebikon Einsiedeln Goldau Ibach SZ Ingenbohl Küssnacht Lucerne Rotkreuz ZG Stans Steinhausen Unterägeri Zug

You can also find this in Lauerz:

Cheese Lemon Aroma Jam Ice Cream To Portion Poultry Still Water Coffee Pods Poppy Seed Roll Canned Fruit