This is a silverdoor dual 1GHz G4 and I was wondering what model would be a good internal replacement, otherwise I was going to get an external burner. I heard that internal replacements don't really work on these early SuperDrive Macs.
I just bought an external firwire drive from www.otherworldcomputing.com. It works great and is compatible with the iLife programs and OS X disc burning. They are a reputable dealer for Mac products only and you will be able to find a drive that is guaranteed to work with you particular machine. I think you can even get a replacement internal 16x dual layer superdrive for about $40 now.