I also get itchy from wool. My solution, which may or may not work for others, was to get some super lightweight silk underlayers. I have a couple of different tops, either crew, V or turtleneck and some silk "long johns" bottoms. For me, that is enough to keep the "itchy twitchys" from happening. Also worked nicely when the lining of my suede pants shredded. I just cut the lining out and wore my silks under them.
Another advantage, the silks are washable and since they are next to your skin, you can wash them as often as needed and the wool or whatever doesn't need to go to the cleaners nearly as often.