I'm glad you found what you wanted. I got a couple that popped up in the woods here. They're no bigger then like 3 ft tall. There are bunches around where I live, and they are just naturally part of the southern landscape. So I'm not sure how they'd do in the north, or what types are meant for you.
Here I'm blessed with Crepe Myrtles, Magnolias and dogwoods sprouting like weeds everywhere. Some of my favorite trees. Like you though, I've wanted a Lilac for YEARS, and I've been told they won't grow here. I dream of the smell of the Lilac. Now I'm told there are several kinds that will do very well when I live and I'm finally on the hunt for one. HOORAY!!!!