take a look at this websitehttp://www.oklahoma.net/~pvtspark/volunteer.html
there is a volunteer within this Johnson county, AR website who, if unable to find what you are looking for, will be able to tell you where to look or contact the correct person.http://www.ar-johnsoncohistory.com/
And finally, the Johnson County, Arkansas historical society to which you can communicate to try to achieve what you set out to obtain.http://www.rootsweb.com/~usgenweb/ar/johnson/johnson.html
where a number of email addresses are available to write individuals who might know where to go for information.
I see also that there is an address to which you can write Johnson County Historical Society, for their help. I don't see any email contact online.
P O Box 505, Clarksville, AR 72830
Rhonda Warmack Houston