A handy person from evanston, il says:
December 10, 2013
the screws are 4" apart
Paul from SWISCO responded:
December 12, 2013
Thanks for posting. I recommend you consider our 82-003. This appears very similar to your own hardware, just make sure the dimensions match up.
Just keep in mind that if your door is thicker than 1", you will have to reuse the internal latch portion of your original handle as well as the old screws.