Would this work?

http://www.sharecg.com/v/4876/browse/5/3D-Model/Microphone-Shure-55SH (3ds max format)

These too:

http://www.renderosity.com/mod/freestuff/?item_id=60214

http://www.renderosity.com/mod/freestuff/?item_id=20794 (non-commercial only)

There's also Imelda at Daz. She's a Genesis character, but comes with one just like it. I wouldn't buy it just for the microphone though if you don't have her already as it's in Daz Studio format.

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