In my opinion you have no choice but to develop your own. I have tried two highly regarded labs in my area, and the scans they give me don't even come close in quality to my own results. They use the same pedestrian Nortisu scanners on semi-auto, optimized for throughput, and do not spend much time per shot, especially if it's a challenging one to scan, there's not enough money in it for them.
My advice is to get better. It is going to be a combination of becoming more efficient with your software tools and getting a better scanning hardware, in my case getting a proper copy stand + negative supply whole-roll negative holder.