I have a Canon L170 Faxphone laser printer. Does anyone know whether you can use refillable toner cartridges and refill the cartridge in the unit and whether you can use generic toner cartridges in this unit? I know there are many websites that sell generic ink/toner cartridges for printers. Many of these online companies are bad and sell very poor ink and that the ink runs out alot sooner than what is stated for each cartridge. I would like a few good reputable online websites that sell high quality generic toner cartridges?