Need a replacement earpiece, no sound..

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http://forum.xda-developers.com – My 9 mo. old son slobbered all over my phone today, his spit/saliva went through every hole possible, immediately i tested every function and only the earpiece stopped working, by earpiece i mean I can not hear anyone when on the phone, unless of course i plug in head phones OR put it on Loud Speaker. I've seen a ear piece sell for $20 on ebay not sure if this is the right part though maybe someone who's replaced this can chime in? http://www.ebay.com/itm/OEM-LG-GOOGL...-/130899403797 thanks! (HowTos)