Midwives brew

Is there an effective recipe for the midwives brew that's just as successful and DOES NOT CONTAIN CASTOR OIL? I've been doing everything I can to try to induce labor. I'm 38 and 4 with my second baby and my doctor is talking about inducing me. I'm absolutely terrified of the idea, but so over being pregnant. I wanted to try this method, but I'm just as uncomfortable of the idea of drinking castor oil as I am being induced. I have my exercise ball, been taking fenugreek and primrose religiously, been drinking Mothers Milk tea, have done nipple stimulation and even went as far as to pump to better mimic a baby nursing. I'm dilated to a 3, 60% effaced and sitting at a -2. My progress is inching each week when I'm needing to go a mile. I've lost pieces of my plug here and there, but no other signs as to my body getting closer. I'm still having irregular contractions. Any advice would be appreciated!