Why did you drop? Why were there problems between you and your PD? I know you may not want to post this online (understandable) but it us hard for us to give advice without knowing. I would recommend calling schools, explaining what happened and see how they feel about it. You may have to call every school, but it shows initiative and may be worth it. As you know crna school is very competitive and you are not likely to find a program that will take you that is desirable (less attractive program that has a harder time recruiting might be your goal).
Programs do not want a student who may drop, and even if you don't want to do that again they do not know you. All they have to go off of is that you previously dropped out and your previous PD won't recommend you.
So call every school, shadow, and see if you can get good recommendations from CRNAs. Good luck.