Maybe relevant, but both Makershed http://www.makershed.com/Arduino_Due_p/mksp16.htmand NKC Electronics http://www.nkcelectronics.com/Arduino-DUE-board_p_382.html seem to have them in stock.
Maybe relevant, but both Makershed http://www.makershed.com/Arduino_Due_p/mksp16.htmand NKC Electronics http://www.nkcelectronics.com/Arduino-DUE-board_p_382.html seem to have them in stock.