Years ago I built a nice mechanism that put a belt through some insane
twists and turns and routing through inaccessible holes and used this
kind of linkable belt called "Accu-Link".

I'm looking for similar stuff today and only see it at harbor freight.
Is there anywhere else to buy it? Nothing against harbor freight for
their usual Chinese junk but I need to find an actual industrial
equipment supplier/distributor that carries it. e.g. Mcmaster-Carr or
Grainger. Maybe they have it but using a different name? They have
plastic ANSI chain but that doesn't survive this kind of twisting.

Tim.