This is a nice traveller track. Looks like the whole package is machined from one piece of alu.

http://www.focusmfginc.com/pictures/JB/jb-2.jpg
http://www.focusmfginc.com/pictures/JB/jb-3.jpg
http://www.focusmfginc.com/pictures/JB/jb-4.jpg

I suppose this is not cost effective unless you have access to the equipment for free, but it was a really nice track.