Left hand throw 19 inch mower blades

[Reedermp]

Hi all! I'm looking for 3 left hand throw 19 inch mower blades that came on a legacy Dura Mower model M-54-MM mower deck on a Satoh Beaver S-370 garden tractor that i still use. The dang thing is almost as old as i am, but i still like it! Any suggestions would be much appreciated!