It is hard to find a replacement screen for your camera, online.
One option that you might consider is to search on places like Ebay for a faulty unit which has a working screen. Verify this before purchase obviously.
Here is a link to just one such unit, (even though the camera is still working). It would be hard to purchase a replacement screen for this price even if one were found.
There is very little information online regarding how to replace the screen, this is the most that I could find.
There are 2 screws in the viewfinder. Take them out and take off the bottom off the LCD screen. There are 2 tabs at the bottom of the piece, they slide to the right and lock in place
Hopefully this is of some help.