Hey,
A friend of mine recently cracked her screen the same way you did and came to me for the solution.
I found a great tutorial which is step by step and very detailed information. You can trust this website, I used it myself.
http://www.screentekinc.com/lcd-removal-instructions_en,macbook.shtml
and to reassemble just do the opposite thing.
Easy as pie! Just follow the directions EXACTLY, be careful!
As for purchasing the screen itself, I got one from ebay for $70.
The seller who sold it to me was "Hootoodeals"
http://myworld.ebay.ca/hootoodeals/
They will ask you for your MMOD number which is located in your display's properties (Apple menu>System preferences>Displays>Color>Open Profile> Then scroll down to MMOD. If you can't see enough to get this information, plug into an external and you can check it all.
The screen took just under 2 weeks to get here and it was in perfect condition. LG brand and protective bubbles and sheets galore. My kitten loved the bubble wrap it came with ;-)
I definitely wouldn't recommend taking it anywhere for an expensive repair, save some money and do it yourself
Hope this information is useful for you!