yeah benzl benzoate will do it as it kills mites. Ivermectin which is also a wormer will do it. Anything that is for scabies or mange (as they are caused by mites as well) but you'll tend to find they have benzl benzoate in them hence why they work
Also veggie oil, olive oil, wd 40, motor oil, vaseline. applied liberally to its feet (not the chemically ones if there are open wounds) will suffocate the mites. Normally you'll have killed them within a week if you do it 3 or 4 times a day if you have time but the scabs take ages to drop off and the legs take ages to heal depending on how bad it is.