Escalade Nav Screen Cracked...Help!

I have an 03 Denali and recently purchased a Nav system out of an 05 Escalade. While I was attempting to put it in, I knocked something against the screen while it was on the bench. Now the screen is cracked. Other than replacing the whole unit, does anyone know of a place that I can get a new screen or have it repaired. Given the amount I've already spent, I'm looking for the most cost affective course of action. The model number is 1520445 and is the NON touch screen version. My car is still under warranty for whatever that's worth. I did find one company that that is a GM repair facility and talked to the tech. He told me he had just the screen, but would not sell it to me for liability reasons, nor would he share what his source for them was. (BS!) So, I need some help. Any ideas?

I HAVE A CONTACT FOR REPAIR BUT IT WILL RUN YOU AROUND 500$ PLUS THE SHIPPING. i HAVE ONE WITH A BAD BOARD AND WOULD BE INTERESTED IN YOURS. EMAIL ME IF INTERESTED. DEON

I have since sold the Denali, but still have the nav system in pieces in a box....which might be to your benefit. Everything is there, it's just in pieces. So, of course I'm interested in selling what I have, how much would you offer me for it?

Thanks,
Gary
[email protected]

In Phoenix.