I guess if you had the existing lintel beams removed and a single steel beam installed this might work, I would think you will still need the corner post to support the end of the beam. I would also make sure the exisitng foundation will support the additional load.
Good luck with your project, and please let us know if you find a solution.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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