Wanted: Way to fix my DS top screen

Recently my DS was sat on by a fat kid. Now after being dropped down almost 15 flights of stairs, bashed against over 100 walls and drowned (twice (Causing the memory to be reset until I left the thing too dry out)) the DS top screen has developed a small crack. Technically it still works, but the crack means the backlight isn't working properly on the top screen. Basically, does anyone know where i can get:

1) A cheap screwdriver to get into the DS insides

2) A new top screen to put in there.

(By the by, I am clumsy, hence why I don't have a PSP)

Make sure you tell that kid to go on a diet.

Also be extremely careful taking it apart because sometimes it just explodes apart. If you do take it apart then wait to order it or make sure you can cancel it so If you do more damage then you can avoid being out of $20.

If it does break more then put everything back together as best you can then close it all up and send it to nintendo.