I finally found a SprintScan 4000 that wasn't priced out of the sky. It comes with a SCSI card, but he didn't say which type, and I didn't ask, just to make my 7600 feel useful. At 144 MB it should have enough RAM. The biggest bottleneck would probably be the Asanté Fast card not working, but I could just transfer the files overnight. But if it turns out to be OS X compatible I suppose VueScan will get the job done. We'll see when it gets here.