Suggest you make contact with www.raafais.gov.au (http://www.raafais.gov.au)
They have PANSOPS designers and would, if anyone, attend international military working groups (I know for a fact they used to)
Also a great Australian company is a supplier of PANSOPS Procedure Design software used both by RAAF AIS and Airservices as well as a number of other countries' agencies. They are on a number of ICAO PANSOPS panels and consulted with the prime contractor for the AFTERPS program. Get in contact with them and I am sure they could point you in the right direction.
Email:
[email protected]
Telephone: +61-2-9380-9777
FAX: +61-2-9380-9788