do the colours vaguely match what you have in the back already? I assume the current interior is cloth?
if so (and if funding perfmits) why not get them... fit the fronts (which get the most wear anyway) and you'll also benefit from sports seats, the headrest screens and half leather.... and then flog the rear seats again to somebody with especially destructive kids...
I think the saloon rear seat will techincally fit, but the backs are a lot higher and it will look very strange...