Transfer Case, a howling sound appeared while driving the car?

A howling sound appeared while driving the car. The source of the sound is most likely the Transfer Case (Getrag 760). I am not in the USA. I started preparing for the Transfer Case repair and bought almost all the necessary parts, gaskets and seals in advance. I keep driving around looking for the missing parts. However, I can't identify the numbers of some of the Transfer Case parts. I am using a drawing I found on the internet. I am including this picture here. Can you tell me the part numbers of these parts?
31 - Transfer Case Rear Output Shaft Bearing Assembly.
33 - Transfer Case Rear Output Shim.
35 - Transfer Case Rear Output Shaft Bearing Spacer.