Hans Spalteholz and I have provided a fresh translation of it in the first volume of Edmund Schlink Works: Ecumenical and Confessional Writings (The Coming Christ and Church Traditions and After the Council), which I edited in 2017. This five-volume project is being published by Vandenhoeck & Ruprecht.
In observance of both the start of Lent and Schlink's birthday, I've chosen as the TM pericope for this week the first two sub-sections of Schlink's address (pp. 266ff. from vol. 1 of ESW):