You can use VueScan drivers available at http://www.hamrick.com/.
Seems to work ok. You can download and try for free but costs about $40 to keep.
Cheaper than a new scanner. Until you buy it, it leaves a watermark on the document.
My scanner makes odd noises when I use this driver don't know why.
I'll be looking to see what else I can do.
Good Luck!