i have broken the screw in end off my kitchen tap?

i have broken the screw in end off my kitchen tap i have tried numerous shops and on line also i can only seem to be able to buy the full tap it is a madrid monodloc tap
Neil Canpbell, July 2008


done
thanks for your answer but i dont think i explained properly it is the end that the water comes out it acts like a shower head sorry for the poor explaination but i am low on the evolutionary scale when it comes to all things plumbing

Neil Campbell, July 2008
Is this the screw that holds the turn knob in place, covering the tap insert? It should be brass, which means that if you carefully drill the head off the turn knob should pull off. If your luck is in the remains of the screw could maybe be removed with pliers or Mole grips...if not, the whole insert can be unscrewed and replaced with a new one. If you do get the insert out, take it with you when seeking a replacement - there are a few different sizes.

John, July 2008