They weren't on any of the 3 charts/prop books I checked. Looking in the motor brochures for 53, 54, and 55 showed a 3 blade propeller. in 56 it changed to a 2 blade. But the 55 was shown on the prop charts able to use a 2 blade, so the 2 blades props I listed before might fit on the 53 and 54. I said might. You would need to have one in your hand to compare, fit, clearances, drive/shear pin placement and size.
