to the op, you might wanna look at some sendra boots, they're not cheap but not overly expensive either, very nice boots overall, I have a pair that look very similar to the ones you've laid out but I don't think the fronts as squared off as the ones you've given as an example but I'm sure they've got some more squared off types.
http://shop-boots.com/sendra-boots-2944-...ebox-black
http://shop-boots.com/sendra-boots-2944-...ebox-black