wanted / Need intake manifold for 308

I am looking for a used aluminum intake manifold for a 1951 308. I am building the engine for The Race of Gentlemen in Wildwood NJ 2020 and intend to modify it to use (3) holley 1904 glass bowl one barrel carbs. Any of the twin h type after market manifolds would work. The side draft carburetor manifold that was made by Clifford would work well also since I could bolt a log type plenum up to it then install the 1904's on top of the log. Please contact me if you know of any for sale. Thank you Warren