I also had the misfortune of BOTH of my windows failing.
They both corroded, the twisted wires that is. Also there was no way to get just the cable, since I kept the old ones to salvage the motors I got a good look at what happened and the over all assembly in general. Donno if you'll be able to use bicycle cables, those in our actuator assembly have special I want to say ends on which they slide into positions all over the place and is what holds them in place, the other issue is the length of the cables. Down here in Florida we get a lot of rain...did I say we get a lot of rain??
My problems were corrosion, and IMO the only way that can happen is with water seeping down in there over the years. I just bit the bullet and did one at a time and I let my dealer do it...It WAS very expensive. I just didn't want to deal with it cause I have BIG hands and it looks like a royal PITA to replace the whole actuator assembly, then of course there was the alignment issue. I had a "master tech" train with the Sky do the job... BTW, the parts used for the Solstice and the Sky is NOT the same part. You also cannot just buy the motor, or just the cable. I ordered the motor from rock auto and everything was not compatible, ended up returning it for credit at my expense (another words waste of time and money). In fact I have a thread in the Sky forum on this same exact issue.. Costs at the dealer for the repairs? Part $335.56 Labor $70.00. The whole cost just for the passenger side cost me $441.02. Now keep in mind that was with a discount for labor
only after I asked them for help on costs. They would not discount the part price, this was just done May 3rd of this year. The drivers regulator I did on Feb 2 of this year, that job cost me $346.28 for the part, and labor was $187.50, however with this job I had a 20% discount coupon from them, ended up just for the regulator assembly $430.13 (plus tax and other misc. items they routinely charge for).. Plus I had other maintenance work done at this time also.
BTW, TS was very familiar with my adventure since he gave out accurate info regarding my issues, we all learned new shlt form my experience....