Amazon.com : IR-40T Ink Roller, Black and Red Compatible with Canon P23-DH V Calculator, Casio HR-100TM, HR-150TM (3 Pack) : Office Products
Victor IR40T IR40T Compatible Calculator Ink Roller, Black/Red - Walmart.com
Amazon.com : IR-40T Ink Roller, Black and Red Compatible with Canon P23-DH V Calculator, Casio HR-100TM, HR-150TM (1 Pack) : Calculator Accessories : Office Products