I had problems with the water pipes on my turbo when i replaced it. What i did was take the pipes to my local hydraulics firm and they took out the old rusty pipes and replaced them with new ones as the pipes are sweated into the fittings so as long as the fittings are ok they should be able to do it. Only cost a fiver per pipe and they came back with straight pipes so got to bend them as i wanted got a bit more clearance on the bottom one. If you are stuggling to find a firm that will do it if you send the pipes to me i could get them done for you and send them back.