Hi tenbears10 ... sorry mate, I don't have a picture to hand. I'll get a pic of it for you next time I'm near a digital camera (don't own a digi-snapper myself!).
Basically - the parang I have is a genuine Malayan job (a mate brought it back for me after doing some voluntary conservation work out there). It's a little bruised and battered, but it does the job just fine (and sharpens like a razor!).
The sheath itself comprises 2 separate pieces of wood which 'join' together along the edge of the blade / back of the blade (ie. the sheath is split in two lengthways, along the spine). The join is basically held in place with twine wrapped around the sheath, rather than glue or resin. Not sure 'what' wood exactly, but could probably find out easy enough - it's a fairly soft wood, if that helps at all.
The advantange of a wooden sheath as I see it is that it's solid - all sounds very obvious and overly simplistic I know - but I feel MUCH more comfortable (and confident) handling a parang sheathed in this way, rather than using a leather sheath. There's also far less danger of the blade accidentally cutting through the side of the sheath when drawn - something ol' Lofty Wiseman is keen to point out, but it's very true - I've seen it happen with a machete! Though thankfully no fingers were lost in the process ...
Sorry this isn't the most useful description! I'll endeavour to get a pic as soon as poss.
Good luck,
G