Replacement of the vent pipe motor in the bathroom

Hello! My father has just removed a motor from the vent pipe in the bathtub. The motor sounded bad. Where can I buy such a new motor (the picture is attached) or who usually can repair and replace it? I mean, whom do I have to contact? I believe this device must have fan blades in normal condition, right? Surprisingly, it always worked without fan blades. :( Slawa

Don't be angry with me because of spelling mistakes.