Really sorry to hear about your loss. All I can offer is sympathy and understanding, having dumped an aircraft in the sea myself.
Like you I was uninsured and spent several days grieving before aching acceptance kicked in. I still kick myself for the combination of physical factors and my errors that caused the loss
I had batteries and controllers and other accessories and the aircraft on its own was relatively cheap on eBay so I bought another. Bare MPs seem to be available so it might be worthwhile calculating what one would cost against the money (less postage, PayPal and eBay fees) that you would get from selling the controller and batteries .
Once again, sorry you have had this experience 