Go down to the parts store & pick up one of those cheapo 10" chrome air cleaners.
Scrap the top and use the base. It works great on those 11" unsilenced cleaners.
I guess thats what I'll have to do. Shame to buy a new air cleaner just for the base, but it will be too much work for me to fabricate one when a new one is cheap enough.
Question, will there be enough clearance around the filter with a 10" base and an 11" housing? It's on a 440 with a mild solid cam and a big Holley carb.