This project needs proper planning, patience, lots of money and time. I don't see shortcuts, this being a ground up restro. As for the parts, you may want to visit the workshop in Golra (E 11). It is just a few blocks towards the shrine as you enter Golra from Margalla Road F 11. The chap had two fiat six hundred shells (one previously owned by me) engine and suspension parts. Your other best best would be Muqeem Autos (the VW parts dealer in Babu Muhalla) he would know where some bits and bobs would be lying still. Best of luck with the restoreation. BTW, lemon yellow or red would look great!!!