The 996GT3 catalogue is perhaps clearer (i got it to open at last).
http://www.porsche.com/all/media/pdf...T3_KATALOG.pdf
Like the GT2, it lists the LSD (the only diff) as part number 996-332-083-9B. It is hard to read from your photo the last two digits but could this be your diff (or does it end "00" or "01").
The GT3 & GT2 use the 999-217-152-01 bolts (only option listed).
(also corrected the part number above for the other bolts, as you mentioned)