Oh well I've ordered the part from Aird Subaru near Inverness and I guess I'm just going to find my own technique. I've currently got the car raised on ramps at the rear end which meant I could see the culprit and catch the drips. I've disconnected the battery and taken the fuel pump fuse out of the engine bay fuse box, so now time to tackle the job. After some consideration I think I will risk letting the car roll down off the ramps,(with me sitting at the wheel ,hopefully stopping before I reach the very close back wall of the garage and then lift it up on axle stands. This will I hope not only enable me to take off the nearside rear wheel but also shut the garage doors!. Yes, it's a small garage and if a South- easterly gale blows then it's a no go with the doors wide open. I'll try and post some pictures and let you know how I get on. If you don't hear from me again then I've failed and bought another car!.