The WinPrint 1000 is based on the Canon PX2 series printer, and incorporates the same print engine as the Hewlett-Packard LaserJet 4L, 4P, 4ML, and 4MP. Although you may not be able to buy the cable or controller card, the printer itself can be serviced by any Canon or Hewlett-Packard service center.

This diagram shows all the components for a PX based printer, like the WinPrint 1000.




Source: http://www.printerworks.com/Catalogs/PX-Catalog/PXAssblyLocDiag.html
See the above site for detailed diagrams of the individual components.

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The toner cartridge is made by Hewlett-Packard, part number 92274A.