Definitely send the equipment to DAG or Sherry. The accessory shoe damage may be a challenge to repair, since that could have damaged the top cover. But they will know what to do to fix it, and ought to have a used one to replace it with. They can do a general overhaul of the shutter speeds etc., and should be able to clean out the fungus (or advise you whether it may have permanently damaged the glass).
That's a very nice friend you have there! I think that once you have everything in good working order, you should take some pictures of her and her family -- that would be a nice way to thank her, and honor her father's memory.