I ordered the 17" iMac G5 (2) Upper Fan Kit for the G5 iMac I have been slowly rebuilding.
One or both of the current fans bearings are going and making a high-pitched squeal and its bothersome. This website claims these fans are original Apple parts and unopened, so I hope that solves the noise issue.
Next up after this will be a new display. I found a place that sells replacement displays for $40! I hope its for real but still need to vet the site and part. The display on this G5 works, but due to its age, it's quite dim.
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Wow. I just tossed a pair of fans from my G5 iMac. I gutted the thing, and was impressed at how it all fit together. I'd have sent you the fans for the shipping... I've got the old screen, if you want a spare... I didn't know if anyone would want to buy an old iMac G5 17" screen. Don't know how many people may have cracked screens that need replacing. It's not an easy part to replace.