For decades, references to this text have surfaced in discussions about Ilm al-Jafr (The Science of Divination), Ilm al-Huroof (The Science of Letters), and Arabic numerology. However, finding the actual manuscript has been a challenge reserved for elite scholars and dedicated collectors.
Check Academia.edu or Google Scholar. Researchers sometimes upload "critical editions" of Abjad texts for their PhD dissertations. Search for: “A Critical Edition of the Abjad risala” or “The numerical mysticism of 13th century North Africa.” Kitab Abajadun Pdf