Hi Phill, you should have mentioned the cable problem in some of our earlier contacts!
Well, I'm sure that cable can be rolled off from a roll somewhere, but I'm not sure if you would be able to actually wire a new piece back inside the coil, you may be able to cut it above the coil and splice it. What I can do if your interested is I have the cable off from a C$ coil, I cut it off from a bad coil and I through the coil away. The jacket seems to be in good shape and if you want it you can have it, just let me Know.
Another thing I've seen done was to take some really GOOD semi wide tape and with some help you can stretch out the cable, run the tape length ways of the cable and just wrap (roll) the cable up in the tape. Its not pretty, its probably not submersible but it works.
I'm thinking that some of the causes of these cable jackets going bad is the use of "Air Purifiers" that also produce Ozone, it seems that as popular as these were just a few years ago that a lot of stuff containing rubber in the house started falling apart.
Mark