Change joints on the drive shafts individually

Hi, apparently a joint is defective with my right drive shaft. For example, when driving out of roundabouts it always makes a tocktock. (still) very quiet and not always present. Perhaps one or both joints of the right drive shaft is defective. Can one get the whole shaft with joints only as a part or also individual parts? Is the exchange difficult? During the K04 conversion the drive shafts were also loose and that was actually not an act… Thank you and greeting Markus