Don't know the specs on the SpaceX boosters. But, once again, the satellite wasn't designed for on-orbit repair and trying to catch the satellite and attached a propulsion module to the correct location on the satellite is a tricky proposition. One that would require a specially built module and one that "probably" doesn't exist. I put probably in quotes since I don't have access to the manufacturers' advanced design centers.
Also, it would probably be cheaper to build and launch a replacement satellite.
Also, it would probably be cheaper to build and launch a replacement satellite.
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A smart FReeper once said that was the case with the Hubble space telescope.
One good thing about the SpaceX recovered stages is a rocket launch using one would be dirt cheap compared to other launch services.