Instruments 
So far, the only three instruments in my collection come from Borneo:

o The lute Sape
o The mouthorgan Keluri
o The mouthorgan Sompoton

Nevertheless, some good descriptions of instruments can be found online:

http://www.rickshriver.net/instrumenthome.htm
This site illustrates the musical instruments of peninsular Malaysia

http://traditionalmalaymusicalinstruments.blogspot.de
A nice overview of instruments with pictures 

http://www.asza.com/ipensol.shtml
Short info and picture of the Negrito nose flute