Air cleaner for Weber wtb or ideas?

[PeteL]

Was under the hood of my 72 and need an air cleaner for the Weber set-up pictured below.  Previous owner had modified some sort of bottom half which is plastic and the homemade plastic top is disintegrating so I figured I would check on options available here.  Interesting pleated custom air cleaner too.  I don't have any stock bits and so I included the shot of the measurements as perhaps a stock top might work? Ideas?  Pete

[Buckeye]

You have already good set up. Just try to fix broken stuff. read following article 

that plastic piece you mentioned chewed up is borbaby heat insulator