Regarding your rear brake pads I've not seen any wear quicker than the fronts under normal conditions. Usually, especially on FWD, they get very little wear.
You mentioned that it's a 56k stock SVT but don't say if you put those 56k on or someone else. It's possible if it were someone else that they had a habbit of driving around with the parking brake on slightly on a regular basis. If this were the case and they were driving for long periods of time you'd likely see signs of overheating, but if they were doing mostly short runs with the car it might not overheat things. Typically, if you're getting accelerated wear on one rear pad it's a sticking claiper, put if both are equally worn and significantly so at 56k I'd look at wheither the E-Brake cable is sticking, etc.
Regarding SS lines, go to the home page of this site and look at the various vendors links such as BAT, CTA Motorsport, SP Motorsport, etc.
Regards, Alan