3 socketed shields are pretty easy to find. Go back to Act II normal and shop Charsi for a Large or Kite Shield. Since the game limits the ilvl in Normal you can still get normal, non-magical, shields. For four sockets you are going to want a Monarch shield as these are the lowest strength requirment shields that can have four sockets. Note also that a Monarch shield is an elite shield and is very prized for its ability to make the runeword spirit in.
As for the Area Level link it appears to be current. I have not played in a while, but the last change I remember to the Area Levels was the introduction of the Level_85 areas and this one has them. You can also use this link to tell what level of monster the item has to drop from to have which number of sockets.