Check with your local medical supplier, maybe you can rent a knee walker. It is for people with one bad foot, a little sling holds your knee and you just push it along. It even has hand breaks, now I have to admit, if I saw some poor curly haired wonam racing down hill, on an out of control knee walker, I would wet myself laughing.
OK, back to the present, you would have all of your mobility, but not have to use your foot!