Disc Brake Proportioning Valve

Can anybody help............. I am trying to locate a disc brake proportioning valve for my 67 Barracuda Formula S

As a side note for anybody interested Year One S_CKS!!!! Everything is one back order and it usually arrives wrong!!! (Order a front brake line kit - back ordered for 3 weeks, after they took my money and then the lines came 3 where right and one was wrong, the wrong one even said for a 68

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