Looking for an exchange/guest/host family in UK

Hi,
my daughter is a 13 year old german girl - quiet, friendly and easy to handle. She wanted to be part of an exchange programm at her school. But more kids from Germany wanted to than York-kids - bad luck with the lottery.
It would be great if she could get the opportunity to live in a family. Best would be the time between 11.-26.10.2014. If you are a family with kids her age it would be perfect but she also would look after smaller kids. She´s used to it.
We live in the north of Germany with parents, 2 girls, a dog, a horse and a sailing boat.
If wanted we would also welcome a girl to stay in our family for some time.
Hope to hear from a nice family soon
Nicole B.