When I had that issue, I used DGIndexNV. Worked fine, but you'll need to shave off the 15 bucks to neuron2 and also you need to have a NVIDIA GPU with CUDA.
Otherwise yes, see if
timecop's dvd2avi works, though in my personal experience it's generally the opposite (eg: timecop's dvd2avi doesn't work with some stuff that dgindex loads fine).