CDW doesn't do the wool with their own standard line, so it won't happen getting them to do one for you. the materials listed on their site are the only options, to the best of my knowledge.
i'd hold off if you are on the fence. honestly, the premium is worth the wait for another season, perhaps a grey one like you want. i'm glad i didn't decide to save a few bucks and get the 60/40 (although i couldn't since they were sold out of the navy 60/40) the wool is top notch. i'll snap some pictures in daylight this weekend to give it some better justice, although it's basically teasing you since you can't get it in your size. if SW does another one in a grey wool, i'll probably instantly buy another one.