I'd search Red River and/or Lamar County. His older brother, William Green, is on SSDI: 14 Feb 1913 - 15 May 1988 with last benefits paid to an address in Paris, Lamar County. Sisters: Mattie Lee Hulse (7 Feb 1911 - 31 Dec 1974) and Allie Moore (26 Apr 1904 - 12 Feb 1968) both died in Paris and Allie was buried in Woodland Cemetery of Red River County. William Green listed as the father of four daughters in Lamar County. Perhaps one of his descendants is aware of the burial location of Allen and Amanda?