Multi plane extrusion

Hi, I am building a multi-body part.  Part#1 comprises many rectangles that all lie in parallel, but offset planes.  The rectangles do not overlap one another when viewed normal to their planes.  I am interested in extruding from these rectangles up to a common plane on body two.  So far, I have simply created multiple extrusions (one extrusion for each plane).  I'm guessing that there is a better way to accomplish this task whereby I can extrude multiple sketches from multiple planes up to a single plane in one fell swoop.  Can you tell me how I might go about this?

Thanks

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