You've seen the flax/water mixture before no doubt. But, what I have found is placing them in the Vita Mix and running it on high makes it extra gooey like an egg. I have found this greatly improves the binding quality.
The reason I mention the Vita Mix is because of its very powerful motor. You may try it on a regular blender but I don’t' think you'll get the same consistency. You may have to add extra water as this method really emulsifies the oil in the flax seeds.