What is/was the largest flex head offered by Massey Ferguson?

I am looking for something in the 24' range to put on my (gasp!!!) IH combine.

The adapter is no problem, I was thinking of something in the 9100 series as that has the hyd reel drive that would work well with my combine.

Our local dealer tells me nothing larger then a 20' was ever made by massey, but I seem to remember reading about 24' and 30' headers years ago.

I am located in South Eastern South Dakota.

Thanks for the help in advance!

Doc