I haven't tried but I an emulsion wouldn't survive freezing, defrosting and warming without splitting, you might might just get it back with the addition of extra yolks or lecithin, a double boiler and a blender.
Bringing it back would be as much hassle as making it from scratch, which is what I was trying to avoid. I like to cook big batches of stuff and then freeze, to make the work more worth while.