"can we get the source code to RMS 3.5.1 and RMS 3.5.2"

Not sure if this will really help you, but Ray Server is based upon Red5 server, and the code should not be much different except where minor changes have been made to the config files. You can check this link for all of the latest info on the Red5 Server progress and downloads. I began using Red5 for my original site over 2 years ago, and it was okay for what I was doing back then. The current release is STILL a Beta, version see more 0.8 RC1, but they have made some pretty significant improvements since I was using it to run my chat. I'm still using it to run the Widgets, and the current "Ray" release does a great job on a dedicated server for me.

http://osflash.org/red5