I discovered today that the Faber Magazine Pencils (https://i1204.photobucket.com/albums/bb413/chthulhu/Pencils/03%20Lead%20holders/Non-Drafting/Leadholders_Non-Drafting_01_IMG_2424_zps988c5cfb.jpg) will hold a D-1 mini-ballpoint refill. Or several; maybe four colors in the magazine and you get a random color each time?