A pitted/galled bearing will be noisy. a loose bearing will be loose but not very noisy.
From your description, I would be inclined to think the bearings are worn/pitted, causing the loose clearance.
Your planned inspection will tell you the condition.
If those are the new style tapered bearings ,try Rockauto.com
just go to parts search and type in the number
Or if you prefer, NAPA or Autozone if they are LM 11949/LM 11910 they are outer wheel bearings for 70's GM vehicles as well as others.
LUCK!
EDIT Sam types faster than me