...head to the Ladies section at your local Goodwill store.
I've been keeping an eye out in the men's section every few weeks in the men's sweaters since shrinking last year's find. I just haven't been finding any. Guys just don't turn over the clothes as often as the Ladies, and the Ladies section is always 3 to 4 times bigger.
Sooooo I wandered over and took a look. They not only have the sweaters arranged by size but sorted by color as well. I found a 100% merino sweater in grey and a 100% lambs wool in a brown plaid!! Needless to say they are what they call "Plus Sizes". I really don't care, just as long as they keep my butt warm!!!