I am not in favour of replacing the original roof and/or pillars. What I am thinking is;
1- For Pillars: To be repaired on surface by fabricating the external side based on dimensions of my other 120Y (which is pretty neat in term of body lines) and then carefully patching it to the original pillar.
2- For Roof: The holes to be soldered (in place of welding) and then leveled by grinding/ sanding. Then the roof to be finished with fine layer branded body filler (3m or equivalent) from both sides i.e. inside and outside.
Would love to have feedback of friends here on my idea and I am very open to explore better solutions 