That would not normally have anything whatsoever to do with the emissions fix. In the UK, a/c compressors are routinely replaced whether or not the electromagnetic compressor clutch is the real problem, and that can be replaced for about £120. Regassing is necessary only every six years or so if the a/c is used throughout the year. If not, the seals dry out over the winter and lose gas and even after regasssing will continue to do so.