I need a XEROX workcentre 3550 driver for Linux Ubuntu 12.04
Okay, so there are some options:
You might be able to click on printer options and have Linux try and download the correct drivers off of the net, or...
Direct Download from the XEROX site: http://www.support.xerox.com/support/workcentre-3550/downloads/enus.html?operatingSystem=linux&fileLanguage=en
I think that the last option has the best chance of working. Let me know how it works out.