Did you get a reply for this as I wold be very interested as my G5 died, graphics problem, 1 year after a new power supply (paid for by me not apple), it was in the number range but Apple Switzerland said no go for a replacement as the warranty period ended in Dec 08.
Both problems and Apple said NO.
I have owned (got) a Macplus, ColorClassic, 630LC, PPC5300, iMac 333, 2 iMac 500DVs, iBook G3, 2 Powermac G3s, MacBook 2007. And been responsible for the switching of at least 7 PC users and subsequent sales, down to walking into the shop with them.
but they still said NO