I have a POlti Vaprotto 2400?

Due to being in a senile state I appear to have put away my daughters' Vaporetto and (don't ask how) I appear to have dislodged a Cloth clip pair from one side of the large head and although we have both looked around the house, cannot find it. Obviously the machine cannot work with the large head without it.
Is it possible to obtain just the clips or must I accept the whole head be replaced? If it is available separately may I have the part number and the item price (its coded as item 9 on the Manual breakdown) Many Thanks