Attempting to locate the graves of Great-Grandparents, Samuel Tennessee Moulder (1801-1888) and his wife Nancy Luster (1811-1899).

Internet data states they are buried in "Green Forest Cemetery, Denver, Carroll County, Arkansas". Have searched the rootsweb transcriptions of seven or more, likely cemeteries in the vicinity of Green Forest and Denver as well as all Boone County transcriptions without result. They do not appear in the rootsweb Carroll County cemetery master list. Any further suggestions or insight would be appreciated?

Thanks ahead of time for any help at all-
Allison Jones