Be an Environmentally Friendly Organisation Our Fields of Specialisation: Remanufacturer of Laser Toner Cartridge;  Remanufacturing Supplies : Toner, OPC Drum, etc;Repair, Maintenance & Spare Parts Sales for Laser Printer; Original Toner Cartridge & Computer Peripherals; Export Enquires Welcome. Top Laser Office Supplies (TLOS) is a sole proprietor Company and have been in the service industry for Remanufactured Toner Cartridges, Repair of LaserJet Printers and other office supplies since March 1991.