Check out Ipod Corrects to find parts needed to fix your ipod. Unfortunately if you have a Ipod Touch/Iphone you are out of luck when it comes to replacement parts. If you want those, and think you have the technical experience to figure them out, i'd suggest buying a bricked ipod/iphone on ebay.
View the following video's to see the process in repairing your iphone, ipod video, and other ipod's.
Replacing the LCD Screen in 5th Generation Ipod Video:
Replacing LCD Screen in Ipod Nano 1g:
Replacing LCD screen in Iphone:
Replacing Battery Iphone: