How to obtain a new iMac G5 PSU

Laurent has one of the infamous noisy iMac G5, so he called Apple Care :

...a simple ring to Apple's tech support in Cork, explaining that my iMac's PSU is as noisy as a Maxtor hard drive ;)
The tech searched in the KB, acknowledge the problem and said he will send me a DYI kit to change the PSU.

Apple told him the spare PSU would reach him by UPS in 7 days. We'll give you an update by then.