The LHBA course covers different strategies for accquiring houselogs, and teaches those authentic, rustic methods you are talking about. I would highly recommend signing up for the email notification, and taking the course.

But shark is correct, contacting a logger locally, or finding a utility pole company are both viable options for getting whole, unmilled logs.

It is important to note that utility poles are machine-peeled. While it isn't nearly as foolish as milling a log (cutting WAY into the grain), it does disturb the outer layers of the grain. So they should be stained / sealed in some fashion. This is not necessary for hand-peeled logs in a properly constructed butt and pass log home. (Many people do though, because they want a certain color, or for their logs to retain a "new" look, rather than weathering gray, like most untreated logs do.)