JE love used to make a chaff spreader for Gleaners or at least the MH machines used in the PNW. It was a belt driven rig with a about 4 fan blade the looked like a radiator fan. They were different pitch and blew the chaff out each side of the machine. Coombs Mfg in Spokane WA bought out the rights to make all of love's aftermarket combine stuff, but I don't think the chaff spreader is still made. You might try calling Blue Mountain Ag in lewiston Idaho and see if they know of one laying around somewhere.