I need a new startup disk for my iBook G4, where can I get one?

Hi, you might call Apple with it's serial# handy & see if they have original replacement discs, other than that...

http://www.ebay.com/sch/i.html?_kw=ibook+g4+software

iBook G4 OS X Tiger/ OS 9.2 Install...

Disk 1 2Z691-5532-A

DisK 2 2Z691-5533-A

(Mid 2005), (Late 2006) Model (A11133 Early 2006), Machine ID PowerBook6,7

Compatibility 
A1133 (12.1 inch), A1134 (14.1 inch), M9846LL/A (12.1 inch), M9848LL/A (14.1 inch)

Tiger Requirements...

To use Mac OS X 10.4 Tiger, your Macintosh needs:

* A PowerPC G3, G4, or G5 processor

* Built-in FireWire

* At least 256 MB of RAM (I recommend 1GB minimum)

* DVD drive (DVD-ROM), Combo (CD-RW/DVD-ROM) or SuperDrive (DVD-R) for installation

* At least 3 GB of free disk space; 4 GB if you install the XCode 2 Developer Tools (I recommend 20GB minimum)

http://support.apple.com/kb/HT1514

Apple may even have an International version...

https://discussions.apple.com/thread/5231053?tstart=0

http://www.ebay.com/sch/i.html?_nkw=mac+os+x+tiger+retail+10.4

See Tom's, (Texas Mac Man), great info on where/how to find/get Tiger...

https://discussions.apple.com/thread/3089008?answerId=15305521022#15305521022

Or Ali Brown's great info on where/how to find/get Tiger...

http://discussions.apple.com/thread.jspa?messageID=10381710#10381710