How to shorten or replace this cabinet door?
How would you go about shortening or replacing these two doors?


I'd only attempt this if


The door was to be shortened by more then the maximum width of the top rail.
I could find router bits that give a reasonable match to existing profiles.
I had a plan B in case I wreck the door.


I would cut the top off at the new height and see if the panel is loose or glued. In my kitchen the panels are loose and retained by slots in the rails and stiles. If loose I would remove the panel to cut the new arch in it. I would hope to use the cut-off top as a template.

I would then try to salvage the rail from the cut-off top. You only need to preserve the visible front edges, so you can be reasonably creative about how you remove the tops of the stiles. Ideally you'd find a router bit of the required profile but lacking that, some careful work with chisel or rotary tool might succeed.

Then its a matter of working out some new way to rejoin the rail to the stiles. You could probably use through-dowels or screws from the sides 

Then I'd use a router bit to re-cut the top profile. Worst case is to grind an old chisel to match the profile and insert that into a block of pine to make a moulding plane for the job.

Finally I'd use filler where needed at the back, sand smooth and repaint.

You have to ask yourself if it is worth the effort.