I'm now at the stage in my rebuild where I can fit new brake pipes to the rear axle of my 1993 Defender 90 (with drum brakes), but the previous fixing clips have disintegrated and I'm not sure how best to fix the new pipe. The parts diagrams show two items - 577873 and 11820L, but these are silly money for what seem to be a couple of tiny clips. What's the best way of doing this?