I couldn't locate a combination lockset like yours, so take a look and consider our 90-278 sweep lock (with screw holes 2-1/16" apart), but substitute the 90-301 keeper (with 1" screw holes). Could you use this?
A quick learner from USA says:
December 6, 2017
Hi Paul: Can I use the 90-278 sweep lock with the original keeper that is currently with the window?