WITT Calysto IV Hard Drive Restore

We are trying to restore the hard drive on the Host Machine on our Witt Biomedical Calysto Image IV System from the restoration CD's but the disc 1 CD is corrupted. It is the "WittImage_G5Host_XPP-BC845DL_11-06-07" image file. We are looking for a source for another set. Any direction is appreciated.