My Gateway M-6307 CD/Dvd drive is broken, How do I fix it?

I had my dvd drive open on my Gateway M-6307 laptop and i put it down. The drive hit something an got busted up.It appears to play dvds still but it crashed my computer twice. Luckily after a bit of fiddling with my power button and battery. It booted up fine. Currently I am using electrical tape to keep the drive closed. I was wondering how I could repair or replace this.The button to eject no longer works the drive just comes out when i remove the tape. I am afraid to take the tape without information on repair for the fear that my laptop will crash for a third time and will not turn back on.