We acknowledge how difficult it must be if there is a need for a temporary change of supervisor. There are a number of incidences that could occur which may prompt a change. For instance, your supervisor may be taking, or be expected to take, a prolonged leave of absence.
If you encounter this issue or any other reason that requires a temporary change of supervisor(s), please discuss this with your programme leader or the staff in your faculty research office in the first instance. It is not your responsibility to find yourself a new supervisor, it is the responsibility of the faculty.