Sorry to hear about the Tiger droppage, Horus! Don't lose hope; there's always a way to fix something in the world of modeling.
Build22 gave you a link for the grilles, but the actual Tamiya product name and number is:
Tiger I Early Production Photo-Etched Grille Set (35217)
Anybody know if there's any difference between the grilles on the early and mid production Tigers? I reckon they're the same.
If there are diferences, there' s still probably 14,000 other PE sets out there for the Mid-Kitty!