Lesson learned on my recent trip to BBtB and back.  You can pull into a
NAPA and they will have the outer front bearing for a '90 Vanagon but not
the inner.  No surprise there.  BUT, at least in Oceanside Ca. the AutoZone
stores WILL have the inner bearing!  One inner bearing in stock at each of
two AutoZone stores in that city.  Other AutoZone stores?  YMMV