Thanks Staffypilot. Had found all except Clamback & Hennesy. Had found the other 3. IAA is the registered holder of 48 planes but Pearson, Aero Dynamic Flight Academy and Air Queensland are listed as the Operators. Have not seen any flights with regos relating to Clamback & Hennesy. Time for some more searching. Have found one IAA Skyhawk listed for sale. It's difficult getting any concrete facts about IAA.