Shawn,
I've got to go to the boat dealer anyway, I'll go poke around ATL Marine and see if they have any left. If I were you, I would definitely call Ski Masters in Kenmore, Wash. They have gobs of stuff lying around. They might have one of either type.
You could try Phil Dill in Texas too, I think they sold a lot of boats.
I think the standard windshield mount bimini (NO straps!) fits under the factory tower. I took mine off when I got the tower, so I can't be sure about that. There may be pics on this site somewhere of one with the bimini up.