This is the picture of a very similar scabbard to Micheal's parang. Taken from a small book issued to British officers { An Introduction to the Malayan Aborigines, P.D.R. Williams-hunt } when faced with duty in the Malasian jungle. The book covers all aspects of life with a small mention of tools and weapons. In case the print is too small the caption reads- A Semelai carved parang sheath. Lipis District, Negri Sembilan. October 1950. Tim
PS, also interesting map. I wonder how much has changed.