Stop in for a cup of coffee

I have a Commando style air cleaner... but was looking at the stock one trying to see how I might modify it. They're upside down from modern ones with just the pie tin and the carb clamp.

If my welding didn't suck so much, I might try something
I cut the bottom out of 2 bbl and welded in a 4 bbl bottom from a cheap aftermarket for my Scout. Worked perfectly..