Nah...
If it's a bearing, whip out the hub and take it down to your local friendly garage and get them to squash a new bearing in. £22 for the bearing and £10 (without reciept) for the sqaushing.
Pop it back on, make sure your camber is all right and then get the tracking done as soon as is economically viable. (Don't bother if you're changing the suspension in the next couple of weeks.)