Just reporting back on how it went, got new front section of pipe, could not get 3/8 coupling here local so used 10 MM worked for a bit then came off so I ordered a wade 3/8 coupling from RS in France, took 2 days to arrive, fitted it and been OK, the wade fitting was a lot better made as to the 14MM banjos to get pipe made up I could find the banjos but they all had short tails on them so hose started very close to banjo which think would not have fitted, I have bought hoses before at same place and not cheap so think the brit-part is not that much more and know it fits
thanks everyone for all your input