Cajon DLM is in Valparaiso; Cajon Peruano Moncada is in Santiago; Cajones Volcan Percusion are located in Villarrica; Flamentr3lok is located in Santiago; Rainier Cajones Peruanos are also in Santiago; Suonare Percusion is in Curicó; Tukutupa is located in Pichilemu
Listed above are links to the cajon drum builders in Chile as retrieved by Internet searches in March 2018. I am sure there are many others not listed. Please send me updates and correction if you have additional information. Thanks.