Besides the tree services, you might check with the local road maintenance people. I stopped when I noticed some trimming trees on the highway right-of-way and told them what I was looking for. I had a good place for them to dump so they started bringing me good logs. (Besides woodturning, I have a sawmill.) Eventually I got more than I could use and asked them to stop.
I also contacted several tree service companies. When taking down useful trees they would call me and I'd come with a trailer if it was wood I wanted. They would load chunks or logs on the trailer (A boom truck can work as a crane). Again, I started getting more logs and chunks that I could use.
Around here, of course, there are many great tree species - cherry, oak, walnut, maple, persimmon, cedar, sweetgum, holly, ash, bradford pear, etc. (I have such trees on the ground now.) Don't know what's common and useful in your area. One friend drove her station wagon from somewhere without good hardwoods just to haul some back.