Amazon.com: Speedball Elegant Writer Calligraphy 4 Marker Set, Black, 2.0 mm, 2.5 mm & 3.0 mm Chisel Nib Tip Pens for Drawing, Journaling, and Scrapbooking
ZIG Memory System Calligraphy Markers – ARCH Art Supplies
Pen-Touch Calligrapher Permanent Paint Markers – St. Louis Art Supply