Wet drivers foot well
 

I have read various forums about people having roof leaks and water appearing inside at various points. It poured down yesterday and just the drivers side floor is soaking wet, i pulled up the carpet and there is a pool of water and the foam under the carpet is soaked etc. None of the surrounding carpet (vertical facing carpet, side carpet) is wet, just the very bottom.

does this narrow down where the leak has come from? Has anyone had exactly the same problem? does anyone know the average cost of having a leak repaired at garage (not official porsche dealership!)?

Any help would be gratefully appreciated, i dont want to have to part with loads of money if possible!

Dan