:Geoff,
Check your local lumber mill before you go driving all over. WRC is used extensivly in the building trades. As Jay mentioned Landon Lumber in Madison has a good stock as well as West Haven Lumber and East Haven Lumber. Most will let you pick through the pile for color if you do not make a mess. If you fail at all other attempts I have a piece of dark Redwood leftover from the Night Heron, if Carlos dosn,t need it (I have two going on at once also.)I am in Orange.
Good luck,
Timothy Mulherin