The Stringbag is exactly the one I was thinking of, too! And I am oftimes tempted to getting the damned Anglia kit...have to resist that impulse. And I think even the plans would be lacking. The Gladiator sure was. Basic design issues, especially on the weight side.
Don't know of another Swordfish plan, but I think there must be several in the Traplet catalog...excuse me, "catalogue"!