Folks pay a fee to purchase copies at the Benson Ford Research Center. They fee just covers cost as far as I know but they don't want folks selling copies. Selling anything with the Ford Motor Co name or logo on it would require a licencing fee just like they charge the reproduction parts folks if they want to put the Ford name or logo on it.
They list the charges on the web site for copies as you can see. If you do it yourself, it's not very expensive. If you wish to have them do it for you, it could get expensive depending on how many drawings a person requires.
https://www.thehenryford.org/collect...arts-drawings/
I'm sure that being a research center for historical documents makes it a lot like any other museum. Museums like to get donations to their cause. The better the donation, the better the services. There are several folks that frequent the different parts of the Ford Barn that have made trips to the Benson Ford for information research. Some of them have written books utilizing that information. They don't have a problem with that.