new holland 488 knives

im looking to rebuild the sickle bar on my old haybine. Icut alfalfa and orchard grass mostly. Im leaning towards topserrated knives. Is that what you would do? Whos a good supplier. Been looking at webb cutter parts. I also need the bolts for each knife. Cant seem to find those online. Dealer only maybe? Thanks for any wisdom.

new holland 488 knives