The downloadable drivers from the manufacturer should be able to install this.
If you allow the Hardware detection wizard to access Windows Update then I wound have expected Windows 7 to be able to find it there itself as well:
Control Panel - System - Advanced System Settings - Hardware Tab - "Device Installation Settings". Select the "Yes, do this automatically" box where it says "Do you want Windows to download driver software and realistic icons for your devices_?"
Lionel MM
What is the name and model of your printer and what version of Windows are you trying to install it on?