Power Steering. Laguna - g-force
I have a leak on both power steering alloy pipe sections. The low pressure side I have managed to fix. The problem is the high pressure side. I was going to use a compression fitting from a plumbers merchants but the pipe is 12MM in diameter which is an awkward size to get hold of. Has anybody got any solutions to this problem.
Many thanks.

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Power Steering. Laguna - mjm
You may find a suitable compression type fitting in a refrigeration parts whilesaler. Most of them have trade counters. Look for companies(in no particular order) like HRP, Dean and Wood, Climate Centre RPW etc. Alocal car air con firm may also stock something similar.

Hope this helps
Power Steering. Laguna - Rishab C
If that's no good, try hydraulic repairers, such as those that repair fork-lifts and plant machinery. I have had a hose and unions made by one once for a fraction of the LandRover part price.