2012 yaris assembled front wheel hub

[myfirstyota]

Not sure you can buy the knuckle with bearing installed. The yaris isn't built with a replaceable hub/bearing unit but rather a bearing that's pressed into the steering knuckle.

Your best/cheapest solution, I believe, is to remove the knuckle yourself and bring it to a shop to have the bearing pressed out and a new bearing pressed in. This will save you the labour to have the knuckle removed from the car by the shop.

Pressing the bearing out and the new bearing in should only take a few minutes. My shop charged me $40 to replace the bearing last time I needed one done. I just brought them the knuckle. Not the whole car.