Well, it was actually a bit of a double fiasco. My horror story will convince you that you went down the right path:
My MacBook suffered a sharp impact behind the screen, which cracked the LCD and the glass. I purchased a new Hi-Res glossy LCD panel and the front glass for $160 or so from powerbookmedic.com. In my zeal, I sealed in the new glass before I tested the display. The cable was loose. While trying to remove the glass, I used too strong a suction cup, cracking the new glass. I went to a local 3rd party Apple repair centre to get the cracked glass removed ($20). Since the glass was already cracked, the chap couldn't use a suction cup and had to use guitar pics and pins along with the heat gun. Now, the rubber surrounding the screen is all screwed but the screen survived without any scratches. I got a new glass from eBay (China) for $20 or so, but that seems to be either a fake or remove from another machine (the glue wasn't so good). No complaints, though.
A question, however: did they give you your old panel back? I think that $800 is the price for the whole top panel (they should have replaced the whole thing). So, they should have given back your original panel.
Regards
Raptor