I was talking to a friend; because you mentioned your wife knits have you tried dying some of her wool yarn. You'd be able to get the quantity you need; and she probably wouldn't miss the amount you took from her skien.
What I do with my wifes yarn is cut some sections in varying lenghths, and then pull it apart. Like a miniature taffy pull. I sometimes mix colors to come up with some really great mixes.
Oh, by the way it is very theraputic after a stressful day.
Jim
There are three ways to complete a project. The right way, the wrong way or the Boss' way. You'd best learn the Boss' way.