I never heard of Melody Ranch, but I just found this over at ebay. It's radio programs, but it has 2 shows of Melody Roundup with John Wayne as a guest star. Is this perhaps what you were thinking of? Take a look and see. Click here http://cgi.ebay.com/Classic-John-Wayne-Vintage-Radio-Shows-VERY-RARE-NR_W0QQitemZ280198072550QQihZ018QQcategoryZ197QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Mark