Did you have success in repairing your cables? You mentioned you would post procedure/pictures. Especially interested in how to get at the end of the cable in the cross bar in the plastic sleeve near the rear window. Any help would be appreciated.
It's a little late to reply but I post it anyway may help someone still have this problem and save (bunch) money too.
The purpose of 2 steel cables (one on each side) is to hold the first section of the top up when you first unlatched & pushed (it needs little help here) it up & it stay up; if they are bad (broken) the first section of the top will not stay up without you hold it up, the top cannot be rosed, it stops there & the switch red light keep blinking if the first section is not up. If you don't mind give it little help at beginning: unlatch, push up & hold it up
(at open, top down to the trunk), and when closing (top up) catch the first section, or it will slam hard to the windshield frame at the end of closing, then you are doing the job of those 2 cables, that what I'd been doing, and bordering me a lot.
Actually the cables themselves do not brake, they are good size heavy duty steel cable for their job, but the (aluminum like molded to the end) end-stops are slipped off (poor quality/design?).
OK, what I did was I put the cable-stops (bought from auto part store $3.46+tax for 2 pack) at the end of the cables (you may spend little time modified the cable-stops, make the hold little bigger find better screws for them ...) but first before put the cable-stop on the cable end, you need to pull the plastic sleeves out from behind of the cross bar, these sleeves used as a anchor the cable at the cross bar; there's very limited space to work on this, use your hand/finger to feel on the cross bar for the holes & sleeves (can not see them with top & liner in-tack); feed the cable through the hole on the cross bar (sleeve already out) then put the cable-stop to the cable end & tighten the screw (I use pliers to hold cable-stop block & screwdriver to tighten up) this is the hard part of the process because you don't have much room to work on and use extremely care not to rip-off the liner or top fabric... after done with this, they will last or not depend on how you put the stops and secured them on the cables, the cable will never brake but these may slip off, ... OK now you put the sleeve on the cable next to the cable-stop(2 piece-part hugging the cable, small opening, when 2 piece formed together, toward the cable stop) then put the whole assembly through the hole on the cross bar and repeat the same procedure to other side cable then you're done.
That's it, it took me 2 hours to do those 2 cables, save me a bunch & may last longer than the new cables (to the way using cable-stops, I hope!)
and my top works like new now, hope will work for you too, good luck guys ...