[WANTED] I’m looking for a check valve for my power brake unit for my 66 barracuda

[68 dart conv]

Hello Everyone
I found this link from 65DartCharger (very helpful) #374 pg 15 he stated that they are from 1963-66 Buick and Oldsmobile, does anyone have a part number or a lead to find one to two them?

"After 18 years of searching I finally have one. Thanks to my buddy Don a great FABO member. This is the check valve located on the vacum hose between the brake booster and the intake manifold. Made by Bendix.
For you guys that needs one they are the same as Buick Oldsmobile for 1963 up to 1966. There is one for sale on Ebay."

I checked my valve and it does not have a restriction in it? If I can get any leads I would be very thankful.
Thank you
Dan