256MB Memory Upgrade for HP Laserjet 4200, 4200n, 4200tn, 4200dtn, 4200dtns, 4200dtnsl, 4300, 4300dtn, 4300dtns, 4300dtnsl, 4300n, 4300tn at Amazon.com
Amazon.com: LD Products Compatible Toner Cartridge Replacement for HP 38A Q1338A (Black) for use in Laserjet: 4200, 4200dtn, 4200dtns, 4200dtnsl, 4200n & 4200tn : Office Products
HP Q2429A / Q2429-67905Maintenance Kit Assembly Compatible with HP LaserJet 4200
Amazon.com: Altru Print 4200-RK-AP Roller Kit for HP Laserjet 4200/4240 / 4250/4300 / 4345/4350 Includes Transfer Roller and Rollers for Tray 1/2 / 3/4 : Office Products
Amazon.com: HP LaserJet 4200/4300 Q2442B Printer Paper Tray/Stacker : Office Products
HP LaserJet 4200 Fuser Assembly 110V (Q2425-69017) Compatible