Part number 99750415100Source-mentioned candidate. Verify fitment and availability independently.
Cited source accounts
uadcammer - I believe he modified his tray. I recently replaced my tray and the part I received had all the holes threaded. Here's the part number: 99750415100 BATTERY CARRIER Replacement went into a 2004 996 C2.
Test or replace the battery
This is a source reference. Confirm exact model applicability in the original material.