I think the Demello and the All-Pro bumpers were designed withe the Warn M8000 in mind, though any regular sized, Warn mounting pattern (most winches), with an external solenoid should fit without too much trouble.
I have a Harbor Freight 10k in my All-Pro bumper. I had to cut the access hole open a little bit wider so the bar across the top of the winch would fit. Maybe 2 inches wider total, 1 inch on each side. It's been fine anytime I've used it (except the once when the power came disconnected).
That Superwinch that Brandon tried linked too (Amazon) wouldn't fit in either the Demello or the All-Pro bumpers because the solenoid is integrated.