Hi,
I found binaries there
http://jogamp.org/deployment/jogl-next/build/There are four zip files for windows and linux, both either 32 or 64 bits.
But to be honest, I don't think those builds can be considered "stable safe". Jogamp's developers could certainly be more precise than me about that point but I understood that there is still hard work to be done.
I am trying to do the same job than you, that's to say porting some old Jogl 1.1.1 code to Jogl 2. For now, I did not succeed to have my application run.
I've read in this forum that Michael Bien and Sven Gothel are going to discuss the project status at SIGGRAPH that is scheduled at the end of July (can't remember whether it is 25th or 27th). I think there are many of us that hope reading some fresh news about what can be expected from Jogl 2's stability in the next months. I can't even be sure that it is reasonable to begin switching to Jogl 2 right now.
Anyway, it would be interesting that you try porting you code and let us know what happened...
Cyrille