There aren't any quick disconnects for the front of our vehicles, only for the rear. The geometry and linkage up front makes it way too complicated for a simple disconnect to work.
At least one guy on the FJ forum tried and made some progress, but it was complicated. A friend of mine here is trying to build off that work but needs a donor front bar to help with the fab work. He might end up buying one but was trying to avoid that route.
I'm personally running with no sway bars front or rear. Took some getting used to on the road but it's great. As you mention, the front just opens up without it off road. That being said, I don't have a bumper or winch up front yet. Adding those is sure to change things up (and I may want it back at that point).