Hello guys. I currently have a MacBook (Early 2009) A1181. I love this computer to death. It has been running great for 2 years now (since April 8, 2009). I have used this computer daily and now the MacBook is missing lots of keys on the keyboard. Also, the trackpad on the MacBook has chunks taken out of the 'clicker'. This doesn't effect the ability to use the MacBook, but to me it looks ugly and unappealing. I was wondering where I could purchase a new top case for my MacBook. I also would like to know how difficult it is to replace the top case myself. Thanks in advance!