Luggage rack part numbers

I won a backrest/sissy bar for my '78 1000 a2 off ebay last week and fedex has lost it somewhere. They have asked me if it had any markings or part numbers stamped on it.

Does anybody know what would be marked on it or have one that they could get a part number off of?

Attached is a picture from the ebay auction of the type I bought.

Thanks!

That looks a lot like the one I have. Sorry to say I have never seen any part number stamped into it. I don't even have the mfg name on it. However, the PO had put a new pad on it and a new pad brace, so maybe it was on that?

Mine also has a helmet lock (no key though). No name on that either