Laserjet 5500dtn drivers - Mac 10.7.5

I've just purchased a refurbished HP Laserjet 5500dtn. My mac is running 10.7.5 and I can't seem to find drivers anywhere online to download and install. The printer is connected via a network / Ethernet cable. When i try to add the printer, I get a message saying

"Software for this printer is available from Apple. Would you like to download and install it?"

I click "Download and Install" 

I then get the following "The software for this printer is currently unavailable. Please contact the printer’s manufacturer for the latest software."

But I have no idea where to get the software from?

Any help would be greatly appreciated before I lose any more hair.