I can only find one further recording from a traditional singer that's commercially available; and that's only a fragment.

The Roud Index currently lists recordings of Bill Thatcher, Grand Rapids, Missouri, 1964 (Edith Fowke collection FO 64); Lena Bourne Fish, East Jaffrey, New Hampshire, 1940/1 (Warner collection: Folktracks 922-90, Whisky in the Jar, twoi verses only ); Mrs Henri Pothier, West Pubnico, Nova Scotia, 1948 (Helen Creighton collection (Nova Scotia Archives) AR 5141 / AC 2251 / 1107); John Obe Smith, Glen Haven, Nova Scotia, 1950 (Creighton (Nova Scotia) AR 5183 / AC 2281 / 1560); James R Shepard, Baltimore, Vermont, 1933 (Helen Hartness Flanders collection (Middlebury College, Vermont) C12 A 04c); Nathan Hatt, Middle River, Nova Scotia, 1952 (Creighton (NS) AR 5443 / AC 2308 / 1990) and Mrs Edward Gallagher, Chebucto Head, Nova Scotia, 1953 (Creighton (NS) AR 5566 / AC 2320 / 2207).

Of course, most of these are archive recordings, not issued commercially. As mentioned above, Lena Bourne Fish's set (sadly truncated, but the Warners were always short of recording tape) can be heard on one of Peter Kennedy's Folktrax compilations:

Whisky in the Jar FTX-022

Further details of the Creighton examples can be seen at http://www.gov.ns.ca/nsarm/virtual/creighton/

The Index to the Flanders Collection shows an additional recording: William Webster, Wakefield RI, 1945 (D53B19c).