How do I use A-Pose rigs in Unity?

I've modeled and animated my character in an A-Pose as opposed to a T-Pose, and Unity forces the model into a T-Pose, obliterating my animations. Is there a way to use the A-Pose that I intended for my character? Setting the rig to Humanoid and attempting to customize the avatar doesn't seem to work unless it's in the T-Pose, and using a rig type like generic ruins the animation by making it squash and stretch like jello.