WTD 3TTT stem part

hmmhmm

Dirt Disciple
Wondering if anyone can help with a part for the following (I'll also consider a new stem of the same type).
It's a black 3ttt stem from the 70s. It is the type where the clamp is in two parts and allows you to fit handlebars ready taped and with brake levers fitted. It used to have an oval disc, engraved with the olympic rings, that screwed in and hid the clamp opening.
It's this disc that I'm after! (got there in the end)
As I said I'll also consider a new, complete stem.
Thanks
 
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