The Hawk "Front Knuckle Overhaul kits with wheel bearings" should have everything you need to rebuild the front knuckles.
In order to check your front bearings, just take apart the front end and pull the hub. Once out you can remove the front bearings and see if they are shot or not. If the problem is with front end wobble you may actually need new Tie Rod ends.
If you have a lot of grease coming out of the back side of the hub around the axle, it might be a good time to rebuild the knuckles anyway.