I really wouldnt want to be using 1inch spacers!
IMO your only realistic option is wider wheels, at least just wider rear ones? Cant you not get only a pair either wider or different offset?
M3 running gear would be a big task and not cheap!
What to do?
Moderator: martauto
Yes, as in a 'pair' the same design as the fronts but wider you dummy 
Will save you from buying a full set and you keep the same design you like
Will save you from buying a full set and you keep the same design you like