Rear Finish Mower Blades for a Master finish mower

[pachner]

My dad purchased a used Master MG-60 finish mower in the ten years hat e have had itit worked great. But now I got a major problem broke a blade can anyone help with this Rotech of Kansas made the mower but has since been sold and new owners dont seem to make a finish mower Can anyone help with locating blades for my mower Thanks