They are quite long actually.Wouldn't the bands have to be long enough for the table to reach both ends of its travel not just the center of the table? Or did I misread your post?
I did...I think I missed posting it here. It's .01" thick.Did you have a chance to measure the thickness of the banding?
For what it is worth I would not use plastic coated cable. Eventually, the plastic covering will fail and foul the mechanism or at least change the tension on the cables.
Was going through the McMaster Carr catalog yesterday. Saw that they do have spring steel banding in .010 thickness in 10,20,75’ rolls for around 20 dollars.