This product is either discontinued or we cannot get that from suppliers.
Konica Minolta TK-154Y Toner Cartridge, Yellow, Printing Laser, Duty Cycle Approx. 6,000 pages @ 5% average coverage, Compatible with Kyocera FSC1020MFP.
KYOCERA MITA TK-154Y Fs-c1020mfp Yellow Toner 6000 Pages.