Look for something second hand then, either find a tyre place doing part worn tyres and ask for a matching set of premium tyres (my local tyre place does this for £15 a tyre but normally you have to wait if you want to be picky as to what you get).
Better still try and find a part worn set of the tyres you want on a set of wheels, Ford wheels are easy to find and you get a spare set of wheels in the process. I managed to get a nearly new set of A032R semi-slicks on Alfasud alloys for £100, not bad considering the Contis cost me £180.