I got this:
This are 10 FT (3.048 m) of Rexnord Table Top Chain, They are plastic on metal chain, model D843K3-1/4.
I tink that this track can be used in a nice and big robot track, if the plastic is sliperry can cover it with anti-skid tape for more traction.
IF someone is interested on this, only have to pay for shipping to your location anywere in this beautiful world !!!
Information of this chain on: