Microphone & Speaker For Sony Cameras

The Sony microphone (SCA-M30 $348 list) & powered speaker (SCA-S30 $548 list) are not cost effective solutions for use on a Sony camera.

I was wondering if anyone could suggest an alternative. This is the camera (SNCVM601B):

I talked to Sony, they have no other ideas.

(Disclaimer: I am the VMS provider but customer is looking to me for a solution in order to use our intercom feature)

Thank you in advance.

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