I sure hope you do better in your correspondence with Giotto's than I have. I have tried since receiving my D4 in May 2012 to get Giotto's to come to the party and make a proper cover for our wonderful D4 cameras. Maybe I did not direct my query to the right place but I did not even get a reply yea or nay regarding the possibility of a D4 specific cover being made for us. To put it mildly I was VERY disappointed.
Maybe now that there are a goodly number of D4's in the field there will be more interest on the part of Giotto's to do something for us. I certainly hope so.
All the best and I am hoping very much that this will happen.