To accurately determine which natural resource is NOT found in East Africa based on the map you mentioned, I'd need to see the map itself. However, generally speaking, all four resources you listed—coffee, gold, cotton, and tea—are associated with East Africa to varying degrees.
If the map shows a specific information that indicates one of these resources is not found in East Africa, that would be the answer. If you have more context or can provide details from the map, I’d be happy to help further!