Hey y'all.

Recently I discovered I have a mild curve in my spine therefore I can no longer do any kind of squat or dead lift type of exercise. I do not want to neglect my legs so I have been doing some leg curls/extensions and double stepping up and down my basement stairs (kind of works but not real well). I don't belong to any type of gym so cool leg machines are out of the question. Any suggestions on something I can do to build my legs?

My gym consists of a standard bench with a 310lb Olympic weight set and a Bowflex for all my cable exercises. Is there a leg lift out there than can work the same muscles as a squat or dead lift with the gear I have? Would a non weighted lunge do anything for me? I basically cannot have any vertical strain on my back.