Cheapest Idaho Surplus Line Broker courses
Ranked on price, and only among courses that satisfy a route to this license. Exam prep is listed further down but not ranked, because it does not qualify you.
No national seller sells a course for this license. There is no surplus lines paper in Idaho. 41-1223 stacks the license on a property or casualty producer license held for two years, so the examination underneath it is the producer one, which has a course list on this site.