WTB YEP-321S 5th Valve

[LazerN]

Hello all,

I am the proud owner of a YEP-321 for both nostalgia and emergency. I am in the market for a 5th rotor valve (either the Stauffer Brass or I believe Yamaha made some for a while). Unfortunately the listing on hornguys states they are out of production so any leads would be fantastic.

Thank you,
Noah