Haha found nothing yet. Look closely enough there small white ones inside that holder round pump also.
Managed to get hold of previous owner who has mentioned that after mechanic reported faulty fuel pump, he has opened tank to find standard pump casually floating around. He went to a wreckers who gave him this setup stating this is a series 1 fuel pump holder set up but I wouldn't have a clue till I get to look at another series 1. In guessing series 2 are different also?