Does anybody know where to find it? I mean where they are still in stock?
As far as I know the 5100's are on backorder pretty much everywhere. If you do find a retailer with some, post their info on here. A bunch of people are looking for 'em. Alternatively, if you don't feel like waiting for 5100's, you could go with 5125's or 5150's, or with OME N85 or N94, or Rancho RS9000.
p.s. I realize you're new here, but you don't have to post the same question in different folders. One thread is enough.