[Michael C Henry]

Local fabric store here is JoAnn's fabrics. The store only has high density foam in store. Anything different would need to be ordered. I went with the "UNI" suggestion and ordered the BF-1 option, light green sheet of air filter material 5/8"x 12" x 16" , and enough to make over two elements. I'll cut three 1 1/2" high by 16" strips. One strip I'll cut into half to make two 8" x 16" pieces, and then joining the 8" pieces to the 16" pieces making two filter element circles 5/8" x 1 1/2" x 24". It will be from material that was intended to be engine air filter material.
I think the high-density foam being used, was too restrictive, causing the spark plugs to carbon foul faster thar usual. I still need to create another hood with a raised area for better air cleaner clearance.