These are the same as Landru's links, but you can attach these to existing cables. I already have connectors on the ends of my cables so i won't be able to use his design as-is, and you might have the same problem.
I created two link types: one with a "top" crossmember, and one with a "bottom crossmember. (The .STLs both look like they only have a bottom, but the top is flipped over so that it'll print)
If this works, maybe Landru will implement it in any updates he does. I probably won't update this myself, but wanted to upload my edits so I could find them easily, and for others to try.
Print an equal number of both top and bottom links, and clip them around your existing cable, alternating the links.
I've also added an stl with both link types on it already, so you can just use multiply in skeinforge to print as many as needed.