Now, all these years later, I discovered a vestment company actually sells something similar. From Trevor Floyd Company:
Deacon Stole Chains are used for the convenience of making a standard Stole a Deacon Stole in either a permanent or transitional way. One end of the clip attaches to one hanging side of the Stole and the other end of the clip attaches to the other side drop of the Stole as illustrated on this page.
Who knew? I decided to order one ($20 plus shipping) and it arrived in the mail today. See below.
I’ll try it out this weekend and report back. Check out this site for more info.
I’m sure Aunt Rose would approve.