MakerFarm
MakerFarm are a company dedicated to helping you build and maintain your personal 3D printer. They specialise in helping with Prusa and PrintrBot 3D printers, as well as supplying parts for other well-known brands like Makerbot.
MakerFarm is an American company located in Utah. They focus not on the full printer retailing, but in the parts for these printers, such as extruders, heat beds, filaments, wiring, and more.