Replacement handle for a Window Master patio door needed

by Jessica
(San Diego)

Photo from CR Laurence catalog

I need a replacement handle for a Window Master sliding glass door with a reverse clamp. The distance between screw holes on the current handle is 5 7/8" but I can only find replacements with a distances of 5 3/8" or 4 5/16". Are either of those likely to work? Or can you suggest somewhere to find an exact match?

Thank you