retro fitting bluetooth to insignia and astra j can actually be done,im in the
process of sorting wiring harnesses out and soon as ive got it up and
running i will let you know.
other factory options will also be available to retro fit but will take time to
collect the relevant information and lot of research in the wiring etc
got a friend thats doing some digging into all this and is working along side
myself to crack it so will be back to you all in due course.