Oooohhhhh, a huge job I would think-cheaper to buy a whole new car.
You would have the cutting out, extra support put in, protection of Alu parts from metal to stop corrosion, electronics etc etc
Good luck if you go at it with a tin opener!!!
Steve - 2002 1.4SE petrol, Silver, black/black interior, Then an identical replacement 2003 A2. Now a Toyota Corolla 1.6 T-Spirit