I found Amazon.com has a deal for OfficeWorld Compatible Toner Cartridge Replacement(Black, High Yield, 2-Pack), enter the code CPN7RUO7 at checkout, final price is $12.74.
Features:
- Alternative Replacement for Brother TN760, includes 2x Black TN-760
- 100% Compatible with MFC-L2710DW, MFC-L2750DW, MFC-L2750DWXL, DCP-L2550DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL, HL-L2390DW, HL-L2395DW
- Estimated print yield of 3,000 pages per TN 760 base on 5% Coverage (letter/A4)