BoldHighlander,

The most popular of the shadow tartans is called Dark Island. This 13 oz. material is available in black and Navy blue. See here:
http://scotwebstore.com/materialfind...on_id=JBpIoFG5

Stillwater Kilts also sells 13 oz. shadow tartan kilts in black, green and saffron. See here:
http://stores.channeladvisor.com/Sti...eight%20Kilts/