As someone who regularly writes SF RP in the SW era, I would dissuade any formal branding of a Special Forces group for the Rebellion. Does this mean there can't be one? No.
It just means if you want it to happen, you should put a team together RP it out and earn that reputation for yourself. As someone who has worked with and trained rebel forces in modern day society, they don't just create their own special forces division in their rebellion, it just kind of happens.
I'm currently looking for writers interested in SF RP, however, so if this is something that the OPs were still thinking about I'd be happy to discuss it with you. A friend of mine are currently working on some Rebel soldiers and will be putting a lot of emphasis on military science fiction writing in the Star Wars setting that you all have created. We will explored the ins and outs of wars and particularly the life of a soldier or operator that is more than your average joe and how they cope and deal with the tremendous amount of stress that they carry with them day in and day out.
Anyway, I've said enough. And yes, I know that the last post in this thread was over like a month and a half ago. Never too late to rekindle the flame!