Kitfox 2 wings

[1avidflyer 1983]

Hi all,  the last Kitfox 1s, and the Kitfox 2 model were built with a wing spar that was not a tube but rather an extrusion.  It was the same diameter as the tubes, used in other models but it had a full length center piece that stiffened the tube.  I'm guessing they were more expensive than the tube and stiffener that Kitfox stayed with on the model 3 and since.  But likely they were stiffer, and may not have flexed as much.  All this is leading up to the question.  Has anyone rebuilt a Kitfox 2 wing and replaced the front spar with a standard tube and stiffener while retaining the older style extrusion spar in the rear of the wing?  Here is a view of those spars as was used in the Kitfox 2.  Thanks,  JImChuk