The Reformed Witness Hour has now published in print the messages heard on the broadcast during the month of March 2015. The five messages were delivered by Rev.R.Kleyn (pastor of Covenant of Grace PRC in Spokane, WA) and were part of a series on the Suffering Servant of Jehovah as set forth in Isaiah 52 and 53.
The entire booklet in pdf form is attached here. But you may also find these four messages separately on the website at the links below:
March 1, 2015 - "Victorious in His Suffering" - Isaiah 52:13-15
March 8, 2015 - "The Man of Sorrows" - Isaiah 53:1-3
March 15, 2015 - "Our Substitute" - Isaiah 53:4-6
March 22, 2015 - "His Silence in His Suffering" - Isaiah 53:7-9
March 29, 2015 - "The Success of His Mission" - Isaiah 53:10-12