My equipment supplier custom manufactures discharge chutes for exmark mowers. I have them on all of my Turf Tracers (60's and a 36(althought I had to modify it for the 36 a little)). Works rather well if you can train your guys to use them:hammerhead:
http://www.kohlerequipment.com/pages/custompages/viewcustompage/1284/The_Kohler_Chute.aspx
http://www.kohlerequipment.com/pages/custompages/viewcustompage/1284/The_Kohler_Chute.aspx