On the part shown on the lower picture & attached below, I’m trying to add a profile to the surface loft feature.  The feature is the “swipe” running along the side of the part.  It should fade out near the front & rear of the part, as is shown.  The problem I’m having is that I want the “sideswipe to not follow the profile of the loft, but run in a straight line orientation as sketched on the upper picture.  Is there any way that I can add that profile to the loft feature and have it follow the straight line path?  I need the sideswipe to blend into the profile of the loft and not look like it’s a “bubble” on the surface of the loft.  Are there any other features that may work better or a combination of features?

I’m using solidworks 2010.