Where can I get a replacement power supply for my 12 inch I book G4

https://eshop.macsales.com/item/Newer%20Technology/APLPBI65W/

Hello,

You can get replacement power adapters from Amazon or eBay.

Best of luck

Hi, and welcome to Apple Support Communities.

Check out ProntoCharger.com. I personally have never done business with them, but if I were looking for a new adapter for my iBook G4, I would give them a try.