Identifying companies who have a history of sponsoring H-1B visas is a good approach for students seeking to target companies who will sponsor H-1B visas. This page includes resources for finding those companies. These resources are all free for you to use as a student at UM-Dearborn, so do not pay for lists of sponsoring companies.
US government data is the authoritative source on visa sponsorship, so any trustworthy website or database will be sourcing all or most of their information from the US Department of Labor.