WTB or trade for USD inflatable vest

[antique diver]

Looking for early 70's era US Divers inflatable vest with the pull-to-inflate oral valve.
Mainly need the oral valve to put on a Voit vest since that particular type also acts as a relief valve.

Prefer a working model or 2 with zipper like in left illustration below, but can compromise with the other vest or even just oral valve only.

Please contact me by my email link, since I forget to check the pm's.

Thanks!