Old comment, but I have to say it, I'm an expert on the EU, and I have no idea what you mean when you say these have been around in the EU before. They haven't. This here is the closest thing that existed in the EU, and it literally only appears in a couple of panels in a Republic comic issue: http://i.imgur.com/RZXXJkV.jpg
The crossguard lightsaber Kylo Ren has, and the ones pictured above were not in the EU, they are totally original creations.