The Rav gave a Hesped for the late Rabbi Shmuel Wosnerזצ״ל, the “Shevet Halevi”, who was nifter on the first night of Pesach, at the end of the Monday Night Shiur on 20/04/15.

The Hesped is available from Kol Haloshon on the following link:

http://www.kolhalashon.com/New/Media/PlayShiur.aspx?FileName=6171-201504...

The Hesped starts at approximately 53:38 on the audio.