At 17 your not going to get much lower than that though, im 18 and my qoutes are around £1.5-£1.7k
It's amazing what a difference age makes. I've held my licence for less than two years, got a couple of claims against me, and I can get TPFT on a Mk3 VR6 for 900 quid. The difference? I'm 27.
I really would have to suggest getting something small like a 1L or 1.3 for a little while. I know it sucks, but the amount of money saved would probably be worth it...
Either that or the old 'Be a named driver' thing (i.e. your mum/dad/brother is the main insuree, but you're down as a named driver). I guess they're probably wise to that these days, and you wouldn't build any no claims for yourself of course, but it always used to save heaps.