I am hoping someone can help me with what I'm sure is a very straightforward question! 

As I say in the subject, I'm looking to download the io-net source code (not the new io-pkg stuff for legacy reasons). I
 have quite literally been on this site and google for several hours trying to find where I can download it without 
success. I'd be really grateful if someone could provide me a URL as to where to get this "historical" versions of QNX 
networking, that is based on netBSD 1.6.

Thank you so much!