I need the part numbers for the inlet rubbers for an NC35. I've got access to the part numbers sheet but have no idea what I'm looking for as they don't appear to be called inlet rubbers.

Hmm. You mean the ones the carbs bolt onto?

16211MR8900 x 2 Left Side (Sitting on bike)
16221MR8900 x 2 Right Side (Sitting on bike)