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.