Just got quoted £425 for insurance on one trackday at Snetterton!! Absolutely rediculous!!!

Norwich Union Direct do not offer trackday cover, and it seems no one else will include cover for a 25 year old on track days in a £54k Porsche Cayman!!

Porsche insurance only cover 2 trackdays a year and no possibility on extensions.

Any other suggestions? (Apart form "take it easy"!!)