HP LaserJet 1200 is only printer. But you are saying you need the driver for scanner. Because in HP website also they say only HP LaserJet 1200 series. Ensure the whether it is HP LaserJet 1200 or HP LaserJet 1220?
You can try with the below link:
Download Hp LaserJet 1200/1220 18.104.22.168 Driver for Windows 9X/ME/NT/2K/XP/2003/Vista/XP X64/2008 - Softpedia