Time invested today
45 minutes. I contacted the number referenced above and described what I was looking for. The Apple Store person listened and eventually transferred me to their Sales Support Group, where I re-described my problem and what I am looking for. After several mis-directions where the support person tried to get me to sign up for "online personal setup" and some other stuff they're likely told to push, she then offered up a MB821AM/A "USB to lightning adapter" for $29 - which is NOT the part I am looking for. When I described (again) the part, she said "we do not have a replacement for that" and said the people on the Apple discussion board are mistaken, and that they likely were referring to a 3rd party part. When I described the part again and where it was in the original OEM packaging, she transferred me to AppleCare (Apple Support) again. As before, I spent more time re-re-describing what I was looking for, to no avail.
I have no reason to dis-believe what both percept and mabandla2003 have told me above. Clearly, they have been able to find/replace said part. However, in over an hour invested during the past two days, six (6) separate Apple sales/support people have not been able to help, each one winding up doubting that such a part exists and claiming that it's a 3rd party item. When cornered by the facts (it came in the original box with the Apple pencil), I have been transferred.
I am amazed by the variability of answers I have received from Apple. This is something I would have expected from Dell. Net result is nothing other than aggravation and time wasted.