I am sure that terry at St. John wilding could make one for 8590 or 9720. I talk to him about make the round type, like what is in 8780, he said he has made rear beater for conventional machine on that same principal. Massey has a flighting kit for the older 8780 that would work for flighting, but would need few more part, as the 8590 is about 8" wider. Onion Farmer would know about the flighting as he has put it on his old machine. As for MF having a kit for 8590 front beater I will look at the part disk next week some time and post if I find something.