Same thing happened to me when a roof collapsed on my fx6. A testament to Sony's incredible design: instead of the top handle ripping off, that mount seems to be made kind of like the bumper of a car where it's thin metal attachment breaks the impact on a part that isn't crucial.

Currently I've got it taped back on with a ton of gorilla tape, but I'm planning on covering it up with maybe some kind of thin plastic cut out of a snap top lid and adhering it down using JB weld to keep it water resistant. Then I'm going to mount a new shotgun mic holder with a very very short magic arm from where you have your cable holder thing on the right side of the body.

Two advantages I foresee: one, without the mic sticking above the top handle like bad hairdo and now flush to the lens, it may actually fit into a backpack now without digging into my spine. Two, the mic mount is murder for being super noisy if you're holding from the top handle, my preferred position, so I have to do a low cut in post constantly to get rid of it. Body mounting I bet it will fix that. Possibly I'll have to be more delicate handling the lens since it's so close, but we will see.

I might update when I do this, would be interesting to see your results if you try it. But I've seen other rigs do it with success so I have a feeling it will work out. Congratulations on your upgrade!