bolero upgrade to bluetooth

Thanks for you hel on here with the maxidot confusion.

now looking at what i would need to upgrade to blue tooth some very helpful post but none really say what is needed,

Are the parts model dependent or will all buletooth modules fit not sure which one i will need.

What other parts woulod be required or easier just to get a kit from skoda or the fiscion.

where to get them and what sort of price i can expect?

thanks for your help

Mick