Banks were responsible for handling and processing many applications, and they were responsible for paying any "finder's fee" for service providers that brought their own clients to that bank for processing applications. You might ask one or more bankers for local referrals, since they will have worked with people up to speed on the details.

You can't get help from ID Dept of Commerce or Revenue or there isn't some grant office to work with directly? Here in MT, we have easy web access to what I believe is all of the different authorities. For instance:

https://commerce.idaho.gov/incentives-and-financing/grants/

They should be able to give you some leads. Everything about these is public info; if nothing else, look up the info to see who signed something or contact an awardee and ask who they worked with. I've been using this website since CARES grants started:

https://commerce.mt.gov/Coronavirus-Relief/Awarded-Grants

And that's because I wanted to see who got how much for which grant in each region. I'm nosy like that.