This is the closest production one I have ever seen:
http://www.musiclandcentral.com/pm282mc.html
The one in the pic looks custom made out of some industrial chain. Sometimes used to drive conveyors etc. You could always substitute some heavy truck timing chain (it's usually two rows like that although not usually quite as thick. Motorcycle primary drive chain would look cool too.
Just keep in mind that even that short length probably weighs around five pounds.
Time to hit the junkyard!