You might give this site a try:
http://www.linuxfoundation.org/en/OpenPrinting
They have forums just for the kind of help your looking for.
If they can't help you, you can also try the Ubuntu hardware forums:
http://ubuntuforums.org/
There probably aren't a lot of people on this site who happen to both use Ubuntu and the printer model you mentioned.
It's been a while since I've installed a printer in Ubuntu, but I remember there was quite a few models available in the drivers list. When you go to install the printer (through the built-in printer configuration tool in the administration menu) you might try the drivers of the closest similar printer model and see if those work.
PerlCoder (http://indicium.us)