Irish Host Family.

Hello,
I am an English teacher in Ireland, and I offer language holidays to international students (aged between 12 and 17)on my farm in Ireland.
I host these young people in my home, and offer English lessons each morning and activities each afternoon. I host up to 4 students at a time, but guaranteed only one of each nationality.The holidays are highly successful, and we welcome students from Germany, France and Spain.
I would love to host Italian students too, however I don't know where to advertise to reach them. Can anybody recommend forums/ other ways of advertising in Italy and reaching parents of Italian teenagers who may be interested in this immersion holiday?
I organise these holidays independently, so I do not use agencies etc. This is a small scale family programme.
Thanks for any help!
Katie.