I have the same problem and I was wondering… Since you say that they moved the tiles to https://tiles.wmflabs.org/osm/12/2127/1375.png and that doesn’t seem to be in black and white (which I need for a client), is there a way to change the colors?
Or is there any other black and white map available?
Have a try Field papers, it is a web-based mapping tool managed by Stamen Design. It allows users to create a map from anywhere in the world (using data from OpenStreetMap), print it out, and mark it up with their own notes. Later, the updated map can be photographed, uploaded back to the Field Papers website, and merged with the original atlas. You only need a computer, printer, digital camera and pen or pencil to capture and share the latest geospatial data with millions of other users around the world. Detail guide please read: https://docsbay.net/guidance-using-field-papers-for-development