try a company called "David Auden" they are brilliant! insured me for full competition use (on rallys), 2000 non-comptetitive miles (second car) although im sure you could get a 10,00 policy, just turned 21, on a nova, with ALOT of modifications all covered for... admitiedly on rally use, but im sure they would cover track days

£400 all in!!! they mirrored my no-claims on my road car and add any extra to the policy over the coming years! only a small family run company, but seem to insure alot of rally cars around the midlands! HTH