Robert,
That looks like it. Mouser had a cad drawing (C-5520470-3-b-2d DXF, sorry I couldn't figure out how to attatch the DXF) of the jack and I made a compairison to the jack on my PICDEM2 board. I miked the PICDEM and the readings were exactly to the cad document. That should do the trick! Mouser Part# 571-5520470-3.

Thanks