[dev] That Hardy Question - Draft Replies

I hate to ask the (seemingly) perennial question concerning draft ticket replies, but I must. Has anyone implemented draft email ticket replies yet? If so, is the implementation available for use by others? I have done the usual googling and have reviewed this list and as much of the otrs list as I could, and found some discussion of intermediate work, but nothing finalized. I have been given this task to do, plus a few others (which I will bring up for discussion in advance and ultimately share), if no one has done it already. Any information, comments, pointers, encouragement, and even discouragement is/are welcome. Thanks - Jim