I think your best bet is to see if Ectaco can replace it for you (for a fee, or...?)
But, here's a link to the manufacturer's site.
http://www.tmdisplay.com/tm_dsp/en/index.html
Hard to find the exact display in their catalog! I'm not even so sure that it can be ordered except in mass quantities. Maybe you can find a used Chinese reader or something and swap out the screen yourself.