Use an old driver (for OSX 10.3) in a new mac (OSX 10.8/9)
You are in luck. Your printer is supported by the Gutenprint open source printer drivers. 

http://gimp-print.sourceforge.net/MacOSX.php

Install these and you should be OK. You may find not all functions of the printer are supported but usually with Gutenprint they come close.