Got my own cones off of wild trees and started some myself. Broke open the cones and placed the seed between layers of wet paper towels in a plastic bag. Left the bag on the window sill for a couple of days and the seeds sterted to pop. Once the seeds sprouted I kept moving the best/biggest ones to larger and larger containers. Planted the three best along the shoreline of the pond behind my house. Biggest is now pushing 40 ft tall in 12 or 15 yrs.
Be aware that they do grow much faster if they are not submerged totally, so plant them where they can get at least some of their roots dry.