hydro fluid leak?

can anyone tell me were i can get hold of a replacement metal hydro pipe that mounts on the hydro pump and then on to the front accumalater mount area. As mine is squirting fluid out of the union that fastens to the pump but i dont see any sign of corrosion or any other holes, is this a common fault? could it be the mount itself worn? ( i am a xantia owner virgin ) can anyone point me in the right direction please.