I think it's called Dearborn Congregational Church. They're located on Rotunda between Greenfield & Southfield, right near the TPC golf club. They sell trees starting on Friday through Christmas Eve. While not in the city, it's close to it. There's also a guy who sets up a small tree lot on the corner of Mt. Elliott & the I-94 service drive right next to the gasoline station on the SE corner. I saw they have the trees piled up there already when I was driving to work this morning. I think that money goes to a church too.