The StyleWriter, StyleWriter II, StyleWriter 1200, StyleWriter 1500, and I'd imagine a few others can all use the Canon BC-02 cartridge, which as Dog Cow says, is still sold new today and unless Canon goes out of business within the next 24 hours, I can't imagine them getting any harder to find any time soon. Even if they do one day discontinue the production of BC-02 cartridges, you'll still be able to get them refilled.