This might be him. This is from Ancestry so the link may not work
But better yet on 'free' familysearch.org https://familysearch.org/search/records/index#count=20&query=%2Bgivenname%3Awilbert~%20%2Bsurname%3Aferguson~%20%2Bbirth_place%3Alouisiana~%20%2Bbirth_year%3A1908-1910~%20%2Bdeath_place%3Atexas~%20%2Bdeath_year%3A1972-1973~