Hi,
5-6 years ago I bought an Octane2 from the UK which came with the orig. disk.
I found a properly registered version of Cineon on it, but never used it.
I still have that machine and use it sometimes, but have since installed a fresh Irix 6.5.30 and Nekoware on it back then
(will soon remove Nekoware and install sgug-rse on it).
I also have that Cineon disk in its original state in storage.
Iirc it did not come with a complete installation source folder and I have never seen it in the wild either.
Cheers, Alex