I am designing a featherweight "replica" of Mortis for a nearby "Sportsman"(no spinners, no wedges, everything else goes) featherweight event. I live in the northeastern United States, and the sportsman class is really popular here. I know that tracked drive has a lot of drawbacks when compared to wheels, but I have decided on tracks for the "coolness factor", and in a class without spinners, there is less risk of the tracks getting damaged.

I have most of the parts I need, but my biggest obstacle right now is finding a source of attachment chain. Attachment chain is the kind of roller chain with flanges on the side of each link. I've seen a lot of robots that have used attachment chain to make tracked drive, Mortis being the most well known. I have found a bunch of manufacturers of attachment chain, but nearly all of these only sell wholesale. Does anyone know of a source for this sort of chain?