I would look into Spring Meadows Hunting and Fishing here in western NE. The owner is a cousin of mine and we have big Muleys out here in this area. He can fix you up or put you in contact with someone who can.
Do not book a hunt with Deer Meadow Outfitters though cause they are known around here for shooting small deer and trespassing. We're having issues right now with the owner driving all over ground we rent and my neighbor caught him trespassing last week.