Ooph. I've got nothing w/that much through it besides a double gun. I'll send out a couple feelers to a few guys, but I suspect it'll be a tough go. The guys I know that shoot that kind of volume yearly to get a gun up to 25K either switch guns between disciplines, buy new every couple years or don't shoot Benelli anything.
Not too sure what else I can say that may be of help. Maybe cold-call a few local clubs/ranges and see if someone can point you in a direction..?.. all I've got right now, Uno.