I can provide 2-3ft, small lilac shoots emerging around my yard. I had to remove them and wanted to prevent them just getting mowed. I have some with pale purple flowers and others with light pink flowers,. They have been on the property for well over 20 years.
At full maturity they are approx 15ft and can form a nice hedge.
They will be dug up upon request and should be planted as early in the season as possible to prevent transplant shock.