Bucket boss toolbelt is the perfect size to fit the large inset. I just used some short bolts with washers on both sides and locking nuts to attach. Could add a closeup photo if needed.
EDIT: I guess amazon links are a nono (first time poster), search "Bucket Boss - Canvas SuperWaist Apron...
Excuse the silly question, but did you put something to screw into behind the door covering plastic? I'm planning the same, and wondering if I need to remove the panel to make it secure. Thanks!