Hopefully the AC Radiator made it unscathed. Here's a video on how to remove the front bumper cover, it's for a 996 but same procedure:
Porsche 996 986 bumper removal - YouTube
If you get lucky and the coolant radiator is all that needs replacing, try Sunset Porsche since their prices for new OEM will likely be the best;
Portland Oregon Porsche Parts & Audi Parts | SUNSET Parts
A picture of mine when I pulled the bumper to clean the radiators, this will give you an idea of whats in there: