Kind of slapped together
Join Date: Jan 2010
Location: Bossier City, LA
Those look like the REAR spindles with the axle through them; they don't have a bearing cap.
Or rather, the factory spindle nut replaces the bearing cap.
I don't think you can find the spindle; however, the bearings, bearing retainer, and hub are all available from RockAuto (and "the other usual suspects".)
Some folks have no problem doing the pressing out and in; I have a local machine shop do mine.