I agree with Philippe. If I were to guess I'd think maybe what the author was talking about is what most in the WMA community refer to as a "Fechtbuch sword".
Arms and Armor make one that can be seen here:
http://www.armor.com/2000/catalog/item187.html If one were to litterly interpret "two hand fencing sword", this fits the bill the closest IMO.
Maybe that'll help you out.
Jared L. Cass, ARMA Associate, Wisconsin