A drop side crib with solid, metal hardware from a quality brand is probably your best bet. Unfortunately they are no longer officially new or secondhand sold because of the ban but there are still plenty in circulation. Definitely avoid anything with flimsy hardware and triple check for correct assembly.
Eta:some history. http://windsorpeak.com/vbulletin/showthread.php?p=3517471
It's a contentious topic. Personally I chose a solid side crib and shopped around to find a really low profile one because I'm short. But in your health situation I don't know that even a low profile crib will do the trick and in your shoes I would consider and research the heck out of drop side cribs assuming you can get one with a known history.