Unfortunately, I believe that, even if you found the hardware, you would not be able to set it up and use it as it will not be able to be added to your account. I know the similar Nvidia dongle was discontinued and stopped working.
See the following current discussion thread for US retailers that do have the Aeotec hub in stock as of the date of this posting:
SmartThings, Hubs, Philips Hue Scenes, Action Tiles and Setup - Help Please - #24 by JDRoberts