If Sharp’s official site returns a 404 error, you can use the Wayback Machine at archive.org . Search for sharp.de or sharp.com snapshots from 2009 to download the original ZIP packages.
There, nestled between drivers for a dot-matrix printer and a zip drive, was the file: SHARP_ARB351_X64_LEGACY.zip sharp ar-b351 drivers
: If the printer isn't found automatically, select the option to Specify Condition and enter the printer's IP address Auto Configuration If Sharp’s official site returns a 404 error,