Do you need the transverse cable or the cable yokes? The yokes are easy to find. If you need a transverse cable, I'm told you can make some using brake cable and these:
Disclaimer: I'm "told" you can do this, I've never done it. You can find them here (scroll down to the bottom):
http://sheldonbrown.com/harris/cable...are-brake.html
You can shoot these guys an email to ask if these'll work. They may even have transverse cables that will work for you, if that's what you need.