ahhh. Yes, much simpler than a custom bumper. A jeep-driving friend of mine said I should just put wheel spacers on there so that it clears (and hangs behind) the bumper. Ridiculous.
Modifying the mount though...seems simple enough. I may decide to go with the cheaper tube bumper then, and keep it mounted to the door.
Perhaps I shoule add some kind of plate on the inside of the door as a brace...