I'm sorry but the information you have been given above is not correct.
RAF Disclosures do not hold any service record information for a person enrolled into the RAAF.
You will find the Operations Record Book for the RAF unit he was attached/posted to at The National Archives at Kew, London.
Copies of the ORB can be ordered from the TNA direct but you will probably get a cheaper quote from one of the independent researchers that they list.
The TNA will not undertake any research on your behalf, again this will be done by an independent researcher.
Regards
Ross