@mayorjim , Jim, 1st and 2nd Links below to a replacement battery door for your camera. You could also do a google search for possible better pricing. Link #3 shows how to replace the door. Good luck.
I hope this helped you out, if so let me know by pressing the helpful button.
https://www.amazon.com/Canon-Genuine-Battery-Cover-canon/dp/B003CBFOW8
http://www.ebay.com/itm/NEW-BATTERY-COVER-DOOR-CASE-LID-CAP-FOR-Canon-EOS-7D-Mark-II-camera-/361439518022
https://www.youtube.com/watch?v=WFpviSkS8HQ