could someone please tell me where I could find the latest nswca ratings for class b and c?

I think they are from mid-december; at least the ones I have seen.

You can go to omaha.com; follow the sports link; then the HS Sportszone link; and then wrestling link under Nebraska. If you get that far ... and the bottom of that page ... is a list of ratings links. I think the ones for class B,C are about a month old though.