Here are the physical postids for all books on the central desk
Midcon North
1075816
1075821
Midcon South
1075817
1075822
Peoples
868544
1076750
Sithe
1075694
1075695
Central Gulf
1075088
1075090
Gulf NGPL
1075087
1075089
Mkt Mich
1075612
1075613
Mkt CG
1075844
1075845
IM- Ontario
1075194
1075195
1075196
Central Transport
1075204
1075205

If you need anything else, let me know.  Thanks
PL