(DOWNLOAD HERE: https://github.com/CloneTrooper1019/Rbx2Source/raw/master/Rbx2Source.exe)
Rbx2Source is a special tool designed to rip meshes & textures directly from Roblox, and assemble them into geometry rigs, which are then compiled into the Source engine.
This is not an official Roblox tool. I developed this independantly, and it has no association with Roblox as a corporation.