I am replacing an old window winder with a whitco window winder. The positioning of the new window winder does not fit the current flyscreen frame and sill (see pictures). Plan to remove the old rivets replace the existing sill and custom cut to fit around the new winder.
A search in Bunnings only brings up the following: https://www.bunnings.com.au/pillar-1-25m-white-sill-section-flyscreen-frame_p0086347
1. How do I attach this to the existing flyscreen frame? or is there a better solution?
2. Is there a black version or will I need to spray paint it black to match the frame?



held on by rivets and slightly bent inwards to fit frame.
Will need to be centered to frame