looking for a dual quad intake for a 318

hey guys, im new to the site. im looking for a dual quad intake for a small block to convert into a blower manifold to accept a 471 blower i have. the only thing i can find new is offy intakes for 400 bucks, i just dont want to spend that much when im gonna throw it right on a mill and weld a plate to it anyway.
or if anyone knows of any old 471 or 671 manifolds let me know, its for a gasser project so im not looking for maximum performance which is why im just using a 4-71.