Rear foot elevated squat with the bar in a traditional back-squat position is a good option for you too. Someone already posted a link to the recent article, but give them a shot. Since it is kind of a single leg option, the weight needed will not be too much to get to your back via a clean and push press.
Elevate the front foot a little as well (also mentioned in the article) to get a little more ROM. Another option would be a lumberjack squat. http://www.youtube.com/watch?v=xUy5y62yJPc
You can do it without a landmine, just shove one end of the barbell into a corner, and load up the other end.