Yes it is missing there. If you are looking for OS9 retail you may look here:
http://www.mediafire.com/sheepmyshaver1 ... aa91bbr3,1
I think the files came from MacGeek417´s server before it went down.
The images inflate to a OS9 retail disk.
And here is another one:
You can also set up OS8.6 with the "New World" ROM, and 8.1 or 7.6 with the 4MB ROM.
The 4MB ROM will also boot with volumes set up with "New World" ROM.
Picking an OS depends on the games you plan to run. Take a look at the games´s release date and make your choice.
In some cases 7.6 was most compatible with old software.