Depending on the way it is constructed and whether it can be separated easily and without damage then you might be able to turn 1x Component cable.in to 3x 10m subwoofer leads. There's a hell of a lot more people needing sub leads than Component video leads. Someone looking to hide their sub lead under the carpet could easily use up 10m by the time the cable has travelled around the edge of the room.
BTW, thank you for the altruistic gesture. It's heartwarming to see someone recognise the value of the help and advice given in this forum and want to do something in rocognition.
To help you find the right person/people for your lead I would suggest two further actions: The first is pictures. These really are worth a thousand words. Although you can't post images directly in to this forum it is possible to post links to pictures hosted elsewhere. There are plenty of free image hosting sites. I use Photobucket but there are lots of others to choose from.
Second, if you have no take-up here then consider placing an advert on AVForums. There's a lot more traffic there.
Good luck