if you had a disk restore before overwriting
Not any freakin way!!!
Even the files written are saved at their memory locations which are irreversible. disk restore only restores the overall system, not the friggin files.
OP could had saved his copy by opening the document very next time, and then abruptly shutting down the system, so that next time system would have suggested file versions and there save times.
But now, I have no idea what else can be done