The IATA committee is called the AODB, unfortunately the data which they maintain in their database is graphical and wont exactly make your life any easier.
The commercial companies were supposed to start offering a worldwide subscription service to support BBJ operators using the BLT, try contacting Steve Hill at SITA and see what they have on offer.
If you are really stretched, we have a couple of "trained monkeys" which we could loan you........... (JT, come visit and you will see what i mean..
)
Cheers.
Mutt.