See if this works - call them if not
If it's anything like my Panasonic, then it's just a deep IEC inlet which won't by itself support the oversize connectors of most aftermarket cords.
Two solutions from Shunyata:
(1) Shunyata universal power adapter (http://www.shunyata.com/Content/products-UniversalAdapter.html) plus your choice of aftermarket power cord; or
(2) Shunyata Diamondback Platinum or Venom3 molded power cord.