HP Designjet 5500 ps driver for Mountain Lion

Hi,

We could not able install HP designjet 5500 ps printer on mac 10.8 and also could not find the driver from the list ( OS X: Printer and scanner software available for download ).

We have installed and used the same printer (driver version 18.4) in OSX Lion before , but last month we purchased new i MAC with Mountain Lion, If am adding the printer system automatically installs one driver (non generic driver), but we cant print large sizes like 42 inch...