This lens is very hard to find in Stock in the US. But finally you get the Tamron 70-180mm FE in Stock right now at Amazon US!
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Tamron 70-180mm FE lens is in Stock and/or shipping here:
In USA at Amazon, BHphoto, Adorama and FocusCamera
In Germany at FotoKoch DE, Amazon DE, Calumet DE.
In UK at Amazon UK, WexUK, ParkCameras.
In Amazon EU stores at Amazon FR, Amazon IT, Amazon ES, Amazon NL.