better yet get some thick truck leaf springs. they are tougher than the bar steel. you can weld the toe of the shoe and with a torch heat the spring steel and weld it as you go to the end of it. i have a 8ft disc mower with the same shoes that came on it 17 years ago. i have replaced the steel on them only 2 times in 17 years. i mowed 400 acres for the first 12 years and just 120 acres these last 5 years. i like truck springs they tough and last a long time. i have even welded spring steel on my turning plow points when they got worn out. i drew a picture of the point when it was new and got the measurements so when i got ready to weld it i could have the same size point as when it was new.