Looking for a host family

Hello, we’re a Christian family with 4 children living in Germany. We’re looking for a host family for our 15 years old son. He would really love to have an exchange time in England. He likes to improve his English and would like to have some cultural experience as well. Any duration of a stay from 3 weeks up to a year would be great. We look forward hearing from anyone who would like to host him or knows someone who might be able to do so. Thank you.