I need a loudspeaker for my phone, where I can founded?

I'm from Paraguay and I bought a Moto G from Amazon, but it came with a speaker failure. I leave in a Motorola Service and they said that need a loudspeaker replacement but I can't found it. Anyone knows about a online store of replacements who have that part? Thanks

I can't afford send it back. It will me cost less buy the replacement and pay the repair. Answer if anyone knows about a online replacements store that had that part. Thanks