Xerox - Black - toner cartridge ( alternative to: HP 27X ) - for HP LaserJet 4000, 4000n, 4000se, 4000t, 4000tn, 4050, 4050n, 4050se, 4050t, 4050tn (006R00926) at TigerDirect.com
1 Pack - Black C4127X 27X Toner for HP LaserJet 4000t 4000tn 4050 4000 4050t | eBay
1PK C4127A Toner For HP LaserJet 4000 4000T 4000SE 4050TN 4100 4100DTN 4100MFP | eBay