273 4 bbl sheet metal plate underside of intake manifold

The sheet metal plate attached to the underside on my 273 4 bbl intake manifold for my '65 FS has gone missing. I'm pretty sure my machinist lost the part, as I have looked everywhere for it. The plate is normally riveted to the underside, and I know some folks feel they're not needed, but I want to keep it original. Picture of the plate installed on backside of manifold:

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Author: admin