Depending on your location, some good, center-of-the plate houses carry some top shelf entrees. For instrance, in Phili. the George Wells Meat Company is a well respected source. In D.C., Metropolitan Poultry has an entree line. D'Artagnan is also the staple 'high end' supply house for the east. Might check them out. Those are the sources that I am aware of for this area. Again, it depends on where you are.
Good luck in your quest.