As a council you can use only one ffc cable for that and one ffc connector to make the extension with NO soldering required, i did so and now my horizontal folded PJ is a real BEAST! (my only problem is my RS mirror,but if i could get the hands on a fs it would be perfect like the benchun's,anyway i did not notice this problem too much).
ffc could be found in any of those old cd-rom reader that are to be discarded.
at their internals you can find a ffc cable with the same pitch as the one of lcds.
take off the connector of the ffc from the cdrom using carefully a cutter together with the cable.
the cable may have more pins but this is not a problem,use a metal ruler and a cutter to cut this cable along and get the number of pins you need,in mine 20..Then insert the free side of the lcd's ffc together with the cabel you prepared at the same connector you took off from the cdrom and then the other side of the cable you prepared to the ffc connector on the lcd.Remember before turning on the lcd check carefully with a multimeter for open and specially for shorts or you may burn everything.the pins of the ffc cable of the lcd should lay over the pins of the cable you prepared inside the jointure connector which serves only to keep them tight one against the other.
regards to all
maXer