Currently there doesn't seem to be any Insurance Company doing any deals for young drivers. All I can say is call as many Insurance Companies as your patience will allow you.
Give whoever you are dealing with a hard time and get them to justify these ridiculous quotes.
My own son was quoted €15000 on a 2008 Toyota Yaris d4d from Alliance. Real Quote followed up by phone call 10 days later to see if we wanted to go ahead with the quote.
18 years old Full Licence.
If you can help anybody with reasonable quotes email me with details of deals.