The only manufacturer that I am aware of, in the reproduction A12 air cleaner was Snobar from Wa who had them made offshore.
Unless they've corrected these items, the reproduction top bridges ( bar over carb opening )
are different from original.

Original pictured in top photo, reproduction on bottom.

There are also 4 of these tabs spot welded around the top surface of the base
Original pictured on top, reproduction on bottom.