I used 8$ seat covers from Princess auto, without modification and work they look like ass. The MX6 seats are the only ones you could do this with (the center of the back rest is actually sepperate from the seat, you can slide your hand through).
I sowed a bunch of bungy straps to the cover and tied them up behind the center cushion so it would take the shape of the seat.
Then I had to take the seats all apart to put the covers on properly, they look OK, I cleaned the seats before I covered them, they came from another car, there blue, I swapped the whole interior to blue (grey is OK but blue is nicer), so if the covers wear out or get ruined, then I'll just cut them off.
And they match the other cheap blue accessories:
