I needed new window handles for an old Swift caravan that were no longer available anywhere. A couple of designs on Thingiverse were close but not quite right and not in a matching set, so I designed my own.
I have done the handle, handle base and the striker plate.
One M3x30mm screw needed for each handle.
These handles have been prototyped and adjusted a couple of times to reach this final result.

Print them solid 100% infill.
PLA will work if its white or a light colour that is less affected by sunlight.
PETG or ABS would be better.
I did mine in black PETG.

Printed solid, these should be as good if not better than the original.

Small supports need on the striker plate only. the other 2 parts need no supports.