You might also try Univ. New Orleans, which has an online collection from Higgins Industries... no idea if the pleasure craft are there. This link from Google wasn't working for me just now, but might later?

Higgins Industries Collection Now Available
Aug 16, 2006 ... The LOUISiana Digital Library and the Earl K. Long Library at UNO have made available online the Higgins Industries Collection. ...
http://www.selu.edu/library/news/art...llection1.html - 17k


Edit: OK, here's another link that might be a start:
http://library.uno.edu/help/subguide...tories/065.htm