2007 Dodge Nitro Wheel bearing part

Hi:
Recently, I've been hearing a strange noise at the front part of my Nitro. When I turn the wheel to the right it stops the noise. But when I turn it to the left the noise comes back and vibrates. A mechanic told me that it was the right-front Wheel bearing that needed to be replace. I ask a local dealer for the price, and they want to sell a complete wheel hub part and is very expensive.. I was wondering if there is a small part that can be replace or if the whole part need to come out.

Thanks,
Bethzaida Rivera