Newbie 2006 seats and rear spoiler

[Glasby2006]

Hi to all this my first berlingo mutispace 
God only knows why I haven't owned one before being a plumber and a father to two kids .
1. Wanting new seats black and grey ones with trays on mind is a 2001 model with no side air bags does the 2006 model with airbags fit and would I have to do something with the electrics 

2. Rear tailgate spoiler   is their any out there