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Well if you can remove them yourself, you can also rebuild them. The kits are available from Subaru, which include new seals, retaining rings, grease, internal O-rings, bleed screw caps etc. New pistons and guide pins are also available but not as good value.
Are they 2 pots or four? did mine, 2 pots, last year not too hard a job. I took some pictures of them as i did them, If you have a go yourself let me know and i will send you the pics if it helps.