TE-20 Precleaner

My TE-20’s air cleaner is in good shape but the pre-cleaner is missing.  Can you give me the specifications so I can make one?  September 13, 2016.

Most UK sourced TE-20 air cleaners have louvered tops or intakes while most of the US sourced air cleaners have a flat top with embossed circular grooves, and sides of a super heavy screen like material with square openings approximately 3/16″ square between the woven wire material. Both the US and UK sourced air cleaners have a band of screen wire, with the ends welded to form a cylinder that fits inside the cover. You should be able to duplicate this screen wire cylinder without too much trouble. The ends overlap, and are electrically spot welded to hold them together.