You can source the Timken wheel bearings from Amazon or other local stores and since your axle while out of the way for the upper control arm, IMO, that is the time to do them! Couple thoughts on the UCA removal. If you are doing struts, super easy task! Once you support the suspension, let the air out completely and they compress relatively easy and come right out. The center 13 or 15mm upper strut bolt can be accessed under the hood by removing the heat shield to the exhaust manifold (I think its a 13mm or 15mm strut nut and one 10mm bolt for the heat shield). You can get the UCA out by itself, but the suspension and hub steering will want to roll over and you can pull the axle out and damage the boots and CV by over-extending. Point is, all of this is manageable, its tight with the strut in but can be done if I remember correctly.
On the bottom of Page 16 on my build page has some good shots of the front end broken down. Honestly, I believe you will same time, effort, and best troubleshoot warn parts by completely disassembling and inspecting everything at once and then putting it back together as you see fit.