see if you can get hold of the spray bar from the wipers of a peugeot 405 from the scrappys cos they are mounted on the wipers and they just clip on and off and then its just a matter of routing the pips so it dont kink or jam when the bonnet is shut
Buy the blades equipped with the washer spray, disconnect the washer hose from the existing nozzels and extend the hose to the new wiper blades using a 4mm coupler. It' not hard.