Hardware :: Suggestions On Replacement Of SuperDrive?

I have a iMac 2GHZ PowerPC G5 and the SuperDrive has gone out for the second time and it is now out of the 90-day warranty. The original equipment is the MATSHITADVD-R UJ-845, but it seems to have been made in China by slave labor and gives more problems than any other single component of the iMac. Do you have any suggestions or insights about how to deal with this and/or replace it? Do you have any inside knowledge about updates to the current replacement hardware or anything like that? It's not that I don't want to take the iMac down to the Apple Store for the fix, it is more an issue of dependability and component longevity. My PC gaming rig is three years old and the CD/DVD-ROM has given no problems whatsoever while the iMac is less than a year old and has had the same component go out twice. (Background on the machine -- Machine Name: iMac G5, Machine Model: PowerMac8,2, CPU Type: PowerPC G5 (3.0), Number Of CPUs:1, CPU Speed: 2 GHz, L2 Cache (per CPU): 512 KB, Memory: 1 GB, Bus Speed:667 MHz, ATA Bus: MATSHITADVD-R UJ-845, Model: MATSHITADVD-R UJ-845, Revision: DBN9, Detachable Drive: No)