Do you need them to be road legal?
If not have a look at the Indysport TR pattern tyres at Ears Motorsport. They are about £65 each. I've got a set and they are awesome in the dry, reportedly good in the damp / wet but I've not tried them in the damp or wet. They may be road legal but I'm not 100% sure, the Maxsport TR tyres are road legal. As far as I know they are German remoulds and the tarmac rally guys give them a good write up.
I got mine off ebay brand new for under £100 so it was worth me trying them.
Paul