Yes it's quite possible that Lloyd (re)wrote "Talcahuano Girls".

I only know of three other versions of this. They are nearly identical to Lloyd's verses but all were recorded later than Lloyd's 1967:
- the Critics Group's "We'll Rant and We'll Roar" (1968 live recording, leaving out the last verse),
- Gordon Hall's "Talcahuana Girls" (c. 1990, the Roud #32688 version you mention),
- Danny Spooner and Duncan Brown's "Talcahuano Girls" (2006).
None of them revealed their source, and all may have gotten the song from Lloyd.