Where can I find someone who can search my car’s CANbus for malware?

Hello! I have a 2005 VW polo, and am interested to see if there is any malware on the CANbus. I believe there may be voice recording software, GPS, and speed data. VW did not put GPS into its vechiles until 2006, so this should be a fairly straightforward investigation. Please can you recommend a forum or similar where I could find someone interested in this?