Tira writes, "I did not find this piece by myself. However, your suggestion of "manuports" is applied to this case. The story behind of finding this piece is as follow :-
This piece was found by excavation of the grave site in Ban Chiang Area which is the important prehistorical culture area of Thailand. Most artifacts found in this area were dated 2000-500 B.C. So, may be the ancient people have found it look like human face and brought it to their living area. I am not sure, but we may think in this case!
So, the answer to your question of What village/water source was it near is: Ban Chiang is the village and the water source is might be the Mekong River which is the nearest river in the Ban Chiang Territory."