I know how you feel, I had trouble finding a place to finish my rating. I had about 30 hours of instrument instruction when my instructor left for a 135 job. He couldn't recommend anyone else at the flight club I fly at to finish up with.
I finished up my rating with PIC. My PIC instructor had 5500 hours total and over 2000 hours dual given. He set up a simulator on my kitchen table and every morning we would do 2 to 3 hours on it. In the afternoon we would go out to the airport and fly 2 to 3 hours. Four days of practice, on the fifth I passed my checkride. The have ads in all the magazines, I think the phone number is 1 800 I FLY IFR.
The second idea I read about a few months ago (I think it was a in AOPA magazine). The guy is based in Minnesota and pretty much all he does is IFR training. You start in Minnesota and fly west till you hit the coast, down through CA, NV, AZ and back to the start. You get to fly in and see SF, LA, Vegas, Grand Canyon, etc. You get a great variety of approaches and air space and are pretty much guaranteed to hit some interesting weather. Sorry, I don’t remember the guys name.
I don’t know if any of this appeals to you, good luck.