Skin Location of "Tree Bridge"

In WE I found this neat little model called "Tree Bridge". It its "Pre-Bridge" form its a really nice tree model. But I want to change the look of the leaves on it to something else. But... I can't seem to find the skin. I converted it to .mdl, then opened it and tried to see what textures it used but...

It listed none. And it has a skin in-game. This can't be right... wheres the skin for this thing?

i think it uses the same textures as the tree walls...

such as this one: ReplaceableTextures\LordaeronTree\LordaeronSummerTree.blp

What mpq would that be in?

It is in the War3.mpq