Anymore, I get complete, and supplies to replace sections from Webb Cutting Components.
Your one-stop cutting parts source, Webb Cutting Components I also use the bolt on method. It aves pulling the sickle out, to replace one broken section. Pull the guard off, unbolt what is left, unless it sheared the bolts, and bolt in a new section. Put the guard back on, and you're ready to get back in the field.
I broke one of the original sickle that was on the machine when I bought it 20 some years ago. Slipped in the new one, and was back in the field in less than an hour. So ordered another to have on hand, for just in case. It's been setting in the corner for 4-5 years, hopefully, it will still be setting there for anther 4-5 years.
I see Webb has complete section kits for your model number haybine, you'll just have to figure out what type of sections you have, or want. Come complete with sections, bolts/nuts,and end section. Some kits start at around $70, for 7 footers more for 9 footers,and certain types of sections.