Hot Rods 401 Nailhead-aluminium intake

Hi guys, maybe a dumb question. ( wouldn’t be my first...)
Buick 401 nailhead - single 4 barrel aluminium intake manifold - do they exist ? I know Offy and Eelco offer tri carb and twin 4 setups but single 4 barrel. ? I cannot recall ever seeing one.....

 

I have never seen one. Russ Martin would know. All of mine are cast iron.

 

Russ Martin can be found at nailheadbuick.com I believe.
He was a big help to me with getting the 425 cu in Buick into my 32 cabriolet.