Sorry for my delay responding and thanks for the compliment. We typically use Hafele for all our pocket/sliding door hardware. Usually the Hawa or Hawa Junior depending on how much the doors weigh. Hafele makes a very fancy track for telescoping doors. As you pull the first (leading) door, a gear attached to the track pulls the second (following) door until the door opening is entirely closed. The version in this photo is just two tracks mounted next to each other, one for each door. Hope this helps.

Actually the hardware is manufactured by Hawa (www.hawa.com) and distributed by Hafele. You can find information on the HAWA-Telescopic at: http://application.hawa.ch/productfinder/Src/Productfinder/dsp_detail.aspx?artID=10672