Amazon.com: MADE IN USA TONER Compatible Replacement for use in Konica Minolta TN321K, TN322, TN221K, TN323K, C224, C284, C364, C224e, C284e, C364e (Black, 2-Pack) : Office Products
LD Compatible Replacement for Konica-Minolta A33K130 (TN-321K) Black Laser Toner Cartridge for use in Konica-Minolta Bizhub C224, C224e, C284, C284e, C364, and C364e s - Walmart.com
Replacing Toner Konica Minolta Bizhub 4 series - YouTube
Amazon.com: CS Compatible Toner Cartridge Replacement for Konica Minolta TN-321 TN321K Black Bizhub C224 C224e C284 C284e C364 C364e Toner Cartridge Black : Office Products