My solution was to get a length of network cable and create my own extended TV-OUT cable.

It's made using normal Cat-5 cable (one pair for each plug, leaving one free) and is 8-10m long, I used two different sizes of heat-shrink sleeving to create the single cables to each plug and runs around the edge of the room and pops through the back of the sofa and under the cushion, it works just as well as the one Nokia supplied.
Just behind the sofa is a power outlet and a charge is plugged in there and it also comes out under the cushion next to the TV-OUT cable, and this comes in useful when late night browsing in front of the TV.