No data and my memory is a little fuzzy on this. Here is what I do remember from previous discussions on D1:
The total incomes for head coaches are all over the place. Head coaches from 30k per year to the low/mid 100's for the Candrea's of softball. The higher the number, the more factors involved (winning over X amount of games, X amount of conference games, making regionals, super regionals, CWS).
Asst coaches were from 10k on up, some had performance factors too.
I also want to say that the information is made public at state universities.
How's that for a maybe, if, kinda, sorta, I think answer?