Motorized Dolly parts and advice? Where to get this box?

[Gene Sung]

Hello,

I'm trying to build this DIY slider. I would just buy one from the guy, but he lives in Germany and I need it sooner than he can get it delivered to me from Germany.

http://www.pocketslider.de/DIY_slider_en.html

The part that I just cannot seem to find is the metal housing box unit. I attached a pic. Anyone have any idea where I can find something like this?

Also, can anyone recommend a good website to get small motors from (preferably in the USA since it's easier) and parts for this DIY dolly? Mostly the metal housing.

Thanks

 

[Paul Hudson]

Project boxes: http://www.allelectronics.com/make-a-store/category/490/Project-Boxes/1.html