Help please. My Franke kitchen tap (about 4 years old) has just disintegrated! The spout has come out, and there two 'O'rings and a hard plastic white washer, the last of which has broken in two. Two questions - one) Can you buy new 'O' rings and washers, and two) how do I fit the hard washer to the body of the spout? The washer is not flexible and the groove in which it fits is quite deep (about 2-3 mm)