This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
Several common printers use this same ribbon: the NEC 8023, some Citoh, etc.. Office Depot sells the black ribbons-- Nu-kote brand, part# NK160-- for about $5 each. They also carry the Color ribbon. Sams Club may still sell them; or, you can order the ribbons through Staples and Hallmark stores. Another source is firstname.lastname@example.org. In a newsgroup posting he offers to supply black ribbons for about $.75 each plus shipping ($3.55 for up to around 10) and color ribbons for about $3.00 plus shipping. By: Mike Ford, Sandra Warnken, michaelhint, Donald L Johnson