Try www.driverguide.com You have to join, but it's free and you can find and download most outdated drivers in there. Just do a search for Lexmark 730 in the Printer section.
Bub, November 2008
simply get the disc/driver software
try the internet by typing driver software for that particular printer
or buy a new printer that comes with the disc, they are really cheap now , like 25 english pounds or less